I. Overview

Concubinage is a felony under Philippine criminal law committed by a married man who maintains a prohibited relationship with a woman who is not his wife, under the circumstances specifically defined by the Revised Penal Code.

It is the counterpart offense to adultery, but the two crimes are not identical. Philippine law treats adultery and concubinage differently in terms of the acts punished, the persons liable, the proof required, and the penalties imposed.

Concubinage is governed by Article 334 of the Revised Penal Code.

The central idea is this: a husband does not commit concubinage merely by being unfaithful. The law punishes him only when his relationship with another woman falls under one of the specific modes listed by law.

II. Legal Basis: Article 334 of the Revised Penal Code

Article 334 provides, in substance, that:

A husband commits concubinage by:

Keeping a mistress in the conjugal dwelling;
Having sexual intercourse under scandalous circumstances with a woman who is not his wife; or
Cohabiting with her in any other place.

The husband is punished by prisión correccional in its minimum and medium periods, while the concubine is punished by destierro.

III. Nature of Concubinage

Concubinage is a crime against chastity under the Revised Penal Code.

It is also considered a private crime, meaning it generally cannot be prosecuted except upon a complaint filed by the offended party. In concubinage, the offended party is the lawful wife.

The State prosecutes the crime once the proper complaint is filed, but the case cannot validly proceed without compliance with the special rules on who may initiate the complaint.

IV. Persons Involved

There are generally three persons involved in concubinage:

1. The Husband

The principal offender is the married man.

He must be legally married at the time of the alleged act. If the man is unmarried, he cannot commit concubinage, although his acts may have consequences under other laws depending on the facts.

2. The Concubine

The woman with whom the husband has the illicit relationship may also be criminally liable, but only if she knew that the man was married.

Her penalty is lighter than that of the husband. The Revised Penal Code imposes destierro, not imprisonment, on the concubine.

3. The Wife

The wife is the offended party. She is the person directly injured by the offense and is the one authorized by law to initiate the criminal complaint.

V. Elements of Concubinage

To secure a conviction for concubinage, the prosecution must prove the following elements:

1. The man must be married.

The accused husband must have a valid and subsisting marriage.

A marriage is considered subsisting unless it has been legally dissolved, annulled, or declared void by a competent court, depending on the applicable legal situation.

A mere separation in fact does not dissolve the marriage. Even if the spouses have long been living apart, the husband may still be liable for concubinage if the legal marriage remains existing and the other elements are present.

2. He must commit any of the acts punished by Article 334.

The law provides three alternative modes:

a. Keeping a mistress in the conjugal dwelling

This occurs when the husband maintains another woman as his mistress in the home where the spouses live or are supposed to live as husband and wife.

The key phrase is conjugal dwelling. This generally refers to the residence of the married couple, the family home, or the place intended for the spouses’ common life.

It is not necessary that the wife be physically present at all times. What matters is that the mistress is kept in the dwelling associated with the marriage or conjugal life.

This mode is especially serious because it directly brings the illicit relationship into the marital home.

b. Having sexual intercourse under scandalous circumstances with a woman who is not his wife

This mode requires more than proof of sexual intercourse.

There must be scandalous circumstances.

“Scandalous” generally means conduct that is public, offensive, shocking to decency, or so open and notorious that it causes public disgrace or social scandal.

Private sexual relations alone are not enough under this mode. The prosecution must show that the intercourse occurred in circumstances that gave rise to scandal, public outrage, or serious affront to social morals.

Examples may include situations where the affair is flaunted publicly, where the sexual conduct is discovered in a humiliating or notorious setting, or where the relationship is conducted with such openness that it becomes a public scandal.

c. Cohabiting with the woman in any other place

This mode refers to the husband living together with the woman as if they were husband and wife, in a place other than the conjugal dwelling.

Cohabitation implies more than occasional meetings or casual sexual encounters. It suggests some degree of continuity, domestic arrangement, or living together.

The prosecution must prove that the husband and the woman maintained a common life or household, or at least lived together in a manner resembling marital cohabitation.

This may be shown through evidence that they stayed in the same residence, presented themselves as partners, shared domestic arrangements, or were generally known to be living together.

3. The woman must not be the wife of the husband.

The relationship must be with a woman other than the lawful wife.

If the accused man and woman are legally married to each other, there is no concubinage between them. However, issues of bigamy or validity of marriage may arise in other contexts if one or both parties had an existing marriage.

4. As to the concubine, she must know that the man is married.

The woman is not automatically liable merely because she had a relationship with the man.

To hold her criminally liable as a concubine, it must be proven that she knew the man was married.

Knowledge may be proven by direct evidence, such as admissions or communications, or by circumstantial evidence, such as familiarity with the wife, public knowledge of the marriage, attendance at family events, or circumstances showing that she could not reasonably claim ignorance.

VI. The Three Modes of Committing Concubinage

Article 334 punishes three distinct forms of conduct. Proof of any one of them may be sufficient, provided the other requirements are present.

A. Keeping a Mistress in the Conjugal Dwelling

This is perhaps the clearest statutory mode.

The prosecution must show that:

The man is married;
He kept a woman as his mistress;
The woman was kept in the conjugal dwelling; and
The woman was not his wife.

The term mistress implies a continuing illicit relationship, not a purely accidental or isolated presence.

The woman’s stay in the conjugal dwelling must be connected with the illicit relationship. A mere visit, temporary presence, or non-romantic stay would not automatically amount to concubinage.

The scandal in this mode is inherent in the act of keeping the mistress in the marital residence.

B. Sexual Intercourse Under Scandalous Circumstances

This mode has two important requirements:

Sexual intercourse; and
Scandalous circumstances.

The law does not punish every act of sexual infidelity by the husband. It punishes sexual intercourse with another woman when attended by scandal.

The requirement of scandalous circumstances distinguishes this mode from ordinary marital infidelity.

Scandal may arise from publicity, notorious conduct, insult to the wife, or circumstances that offend public morals. It is a question of fact determined from the evidence.

For this mode, the prosecution must prove the sexual intercourse itself. Proof may be direct or circumstantial, but it must establish guilt beyond reasonable doubt.

C. Cohabitation in Any Other Place

Cohabitation is broader than a single act of sexual intercourse. It usually involves living together, maintaining a household, or habitually staying together in a manner that suggests a marital relationship.

The phrase “in any other place” means outside the conjugal dwelling.

Evidence of cohabitation may include:

Residence in the same house or apartment;
Neighbors or witnesses seeing them living together;
Bills, lease records, or official documents showing common residence;
Photos, messages, or admissions indicating they live together;
Presentation to others as a couple;
Domestic arrangements suggesting a shared household.

Occasional sexual encounters, secret meetings, or hotel visits may not be enough unless the facts show cohabitation or scandalous sexual intercourse.

VII. Difference Between Concubinage and Adultery

Concubinage and adultery are often discussed together, but they are legally distinct.

A. Adultery

Adultery is committed by a married woman who has sexual intercourse with a man not her husband, and by the man who has carnal knowledge of her knowing that she is married.

Each act of sexual intercourse may constitute a separate act of adultery.

B. Concubinage

Concubinage is committed by a married man only if he:

Keeps a mistress in the conjugal dwelling;
Has sexual intercourse under scandalous circumstances; or
Cohabits with the woman elsewhere.

Unlike adultery, simple proof of sexual intercourse by the husband with another woman is not automatically enough. The act must fall under Article 334.

C. Key Distinction

For adultery, the law punishes the wife’s sexual intercourse with another man.

For concubinage, the law punishes the husband’s prohibited relationship only when it reaches the statutory level of keeping a mistress in the conjugal dwelling, scandalous intercourse, or cohabitation.

This distinction has long been criticized as unequal, but it remains part of the Revised Penal Code unless changed by legislation or invalidated by the courts.

VIII. Who Is the Offended Party?

The offended party in concubinage is the lawful wife.

She is the person whose marital rights, honor, and status are directly violated by the husband’s acts.

Because concubinage is a private crime, the wife has a special role in the institution of the criminal action.

IX. Who May File the Complaint?

The complaint for concubinage must generally be filed by the offended spouse, meaning the wife.

The prosecution cannot proceed in the usual manner without the complaint of the offended party.

The complaint must include both guilty parties, if both are alive and known. This means that the wife must generally charge both:

The husband; and
The concubine.

This rule prevents selective prosecution and recognizes that the offense involves both participants in the illicit relationship.

X. Requirement That Both Guilty Parties Be Included

In crimes such as adultery and concubinage, the offended spouse must include both guilty parties in the complaint, if both are alive.

The purpose is to avoid allowing the offended spouse to prosecute only one party while sparing the other.

However, if one of the parties is dead, unknown, beyond reach, or otherwise cannot be prosecuted for a legally sufficient reason, that circumstance may affect the application of the rule.

The general principle remains: when both the husband and the concubine are known and alive, the complaint should include both.

XI. Effect of Pardon by the Wife

The wife’s pardon may bar prosecution.

For pardon to have legal effect, it must generally be made before the institution of the criminal action.

Pardon may be:

Express, when clearly stated; or
Implied, when inferred from conduct.

An example of implied pardon may be voluntary continued marital cohabitation after knowledge of the offense, depending on the circumstances.

However, forgiveness, reconciliation, or isolated acts of civility do not always amount to legal pardon. The facts must be carefully examined.

XII. Effect of Consent by the Wife

Consent also bars prosecution.

If the wife consented to the husband’s relationship with the other woman, she cannot later prosecute the husband for concubinage based on that relationship.

Consent means more than mere suspicion, silence, or inability to prevent the affair. It requires conduct showing that the wife allowed or accepted the illicit relationship.

Consent may be express or implied, but courts generally require clear proof because consent operates as a bar to prosecution.

XIII. Distinction Between Pardon and Consent

Although related, pardon and consent are different.

Consent is given before or during the act. It implies that the offended party allowed the illicit relationship.

Pardon is given after the offense has been committed. It implies forgiveness after knowledge of the act.

Both may bar prosecution, but they operate at different points in time.

XIV. Can the Wife File Concubinage After Separation?

Yes, if the marriage still legally exists and the elements of concubinage are present.

A de facto separation does not dissolve the marriage. The husband remains legally married.

However, the circumstances of the separation may matter. If the wife consented to the husband’s new relationship, or if there was a valid pardon, prosecution may be barred.

Also, if the husband merely entered into a relationship after separation but did not keep a mistress in the conjugal dwelling, did not have scandalous sexual intercourse, and did not cohabit with the woman, concubinage may not be established.

XV. Concubinage and Legal Separation

Concubinage may be a ground for legal separation under family law, separate from criminal prosecution.

A criminal case for concubinage and a civil family law case are different proceedings.

A wife may pursue remedies under family law, such as legal separation, support, custody, or property-related claims, depending on the circumstances.

The criminal case punishes the offense. The family law case addresses marital status, rights, obligations, and consequences between spouses.

XVI. Concubinage and Violence Against Women

In some circumstances, marital infidelity may also be relevant under the Anti-Violence Against Women and Their Children Act, or Republic Act No. 9262, particularly when the conduct causes mental or emotional anguish to the wife or children.

This does not mean that every act of infidelity automatically becomes a VAWC case. The facts must show the elements required under RA 9262.

Concubinage and psychological violence under RA 9262 are distinct legal concepts. They may arise from overlapping facts but require different elements and proof.

XVII. Concubinage and Bigamy

Concubinage is also different from bigamy.

Bigamy is committed when a legally married person contracts a second or subsequent marriage before the first marriage has been legally dissolved or before the absent spouse has been declared presumptively dead in the manner required by law.

Concubinage does not require a second marriage. It involves a prohibited relationship with another woman under Article 334.

If a married man contracts a second marriage and also lives with the second woman, facts may potentially raise issues of both bigamy and concubinage, depending on the circumstances. But they are separate crimes with separate elements.

XVIII. Evidence in Concubinage Cases

Concubinage, like all criminal offenses, must be proven beyond reasonable doubt.

Evidence may include:

Marriage certificate proving the lawful marriage;
Testimony of the wife;
Testimony of neighbors, relatives, or other witnesses;
Photographs or videos;
Messages, emails, or social media posts;
Lease contracts or utility bills;
Hotel, condominium, or residence records;
Birth records of children, where relevant;
Admissions by the husband or concubine;
Public behavior showing scandalous circumstances;
Evidence of shared residence or cohabitation.

The nature of evidence needed depends on the mode alleged.

For cohabitation, proof of common residence or domestic life is important.

For scandalous sexual intercourse, proof must show both sexual intercourse and scandalous circumstances.

For keeping a mistress in the conjugal dwelling, proof must connect the woman’s presence in the marital home with her status as mistress.

XIX. Defenses in Concubinage

Common defenses include:

1. Denial of the relationship

The accused may deny the alleged affair, cohabitation, or sexual relationship.

2. No valid or subsisting marriage

The husband may argue that there was no valid marriage, or that the marriage had already been legally dissolved or annulled.

However, parties generally cannot simply declare their marriage void on their own. Philippine law often requires a judicial declaration of nullity for purposes of remarriage and legal certainty.

3. Lack of the statutory acts

The husband may admit infidelity but argue that the acts do not amount to concubinage because there was no mistress kept in the conjugal dwelling, no scandalous sexual intercourse, and no cohabitation.

This is a significant defense because not all infidelity by a husband constitutes concubinage under Article 334.

4. Lack of scandalous circumstances

If the prosecution relies on scandalous sexual intercourse, the accused may argue that any alleged sexual act was private and not scandalous under the law.

5. No cohabitation

If the prosecution relies on cohabitation, the defense may argue that the parties merely met occasionally and never lived together.

6. Lack of knowledge by the concubine

The woman may argue that she did not know the man was married.

This defense is personal to the concubine. It does not necessarily absolve the husband.

7. Consent or pardon by the wife

The accused may argue that the wife consented to or pardoned the relationship, which may bar prosecution.

8. Prescription

The accused may raise prescription if the complaint was filed beyond the period allowed by law.

Prescription depends on the penalty and applicable rules. The specific facts and dates are important.

XX. Penalties

Under Article 334:

Husband

The husband is punished by prisión correccional in its minimum and medium periods.

Prisión correccional generally ranges from six months and one day to six years. The minimum and medium periods cover a lower portion of that range.

Concubine

The concubine is punished by destierro.

Destierro does not involve imprisonment. It is a penalty of banishment or prohibition from entering designated places within a certain radius.

The law’s imposition of different penalties reflects the historical structure of the Revised Penal Code, though the distinction has been subject to criticism.

XXI. Civil Liability

As with many crimes, criminal liability may carry civil liability.

In concubinage cases, civil liability may include damages depending on the facts proven.

The offended wife may claim damages for injury to honor, emotional suffering, or other legally recognized harm, subject to proof and the court’s appreciation.

Civil consequences may also arise separately in family law proceedings, including legal separation, property relations, support, or custody issues.

XXII. Prescription of Concubinage

Prescription refers to the loss of the State’s right to prosecute due to the passage of time.

Concubinage is punished by prisión correccional for the husband and destierro for the concubine. The prescriptive period is determined by the classification of the offense and the penalty prescribed by law.

In practice, determining prescription requires careful attention to:

The dates of the alleged acts;
Whether the offense is continuing, especially in cohabitation cases;
When the offended wife discovered the acts;
When the complaint was filed;
The applicable rules under the Revised Penal Code and related statutes.

Because cohabitation may involve continuing conduct, the reckoning of prescription may be more complicated than in an isolated incident.

XXIII. Concubinage as a Continuing Offense

Concubinage may sometimes involve continuing conduct, especially where the husband cohabits with the woman.

In cohabitation cases, the offense may continue for as long as the unlawful cohabitation continues.

This matters for prescription, evidence, and the framing of the complaint.

However, each case depends on the specific allegations and proof.

XXIV. The Role of the Wife’s Complaint

The wife’s complaint is not a mere formality.

It is a jurisdictional or procedural requirement in the sense that the law does not allow prosecution of concubinage without the initiative of the offended spouse.

The complaint demonstrates that the offended party seeks criminal prosecution and has not consented to or pardoned the offense.

A complaint filed by a person other than the offended wife may be defective unless legally justified by special circumstances.

XXV. Can the Husband Alone Be Charged?

As a general rule, both the husband and the concubine must be included in the complaint if both are alive and known.

The offended wife should not charge only the husband while excluding the woman with whom he allegedly committed the offense.

However, if the woman is unknown, dead, or cannot be prosecuted for a legally sufficient reason, the complaint may present that fact.

The safer legal principle is that both guilty parties must be named when possible.

XXVI. Can the Concubine Alone Be Charged?

Generally, no.

The concubine’s liability is tied to the husband’s commission of concubinage. Since the crime is based on the married man’s prohibited conduct, prosecuting only the concubine would ordinarily be improper when the husband is known and alive.

Both should be included if prosecution is pursued.

XXVII. Is the Wife Required to Prove Sexual Intercourse in All Cases?

No.

Sexual intercourse must be proven when the prosecution relies on the second mode: sexual intercourse under scandalous circumstances.

But in the first and third modes, the focus is different:

Keeping a mistress in the conjugal dwelling; or
Cohabiting with the woman in another place.

These modes may imply a sexual or illicit relationship, but the statutory focus is on keeping a mistress or cohabitation.

Still, the prosecution must establish that the relationship is illicit and not innocent.

XXVIII. Meaning of “Mistress”

A mistress is a woman maintained by a married man in an illicit relationship.

The term suggests more than friendship, employment, or casual association.

For a woman to be considered a mistress, the evidence must show a romantic or sexual relationship inconsistent with the husband’s marital obligations.

A house helper, tenant, business partner, or relative cannot be treated as a mistress without proof of an illicit relationship.

XXIX. Meaning of “Conjugal Dwelling”

The conjugal dwelling is the place where the spouses live or are supposed to live as husband and wife.

It may include the family home or residence established by the married couple.

The concept is not limited to property owned by both spouses. A rented apartment, house owned by one spouse, or residence provided by relatives may still be the conjugal dwelling if it is the marital home.

XXX. Meaning of “Scandalous Circumstances”

Scandalous circumstances refer to facts that make the illicit sexual relationship publicly offensive, shocking, or disgraceful.

The scandal must arise from the manner, place, publicity, or surrounding circumstances of the sexual conduct.

The law does not punish private immorality alone under this mode. It punishes sexual intercourse that becomes socially scandalous.

The scandal may be shown by public knowledge, community outrage, humiliation of the wife, or open and notorious behavior.

XXXI. Meaning of “Cohabitation”

Cohabitation means living together as a couple.

It does not necessarily require formal marriage-like arrangements, but it requires more than sporadic meetings.

The essence is continuity and shared domestic life.

Courts may consider the frequency and duration of stays, the existence of a common residence, shared household expenses, and how the parties present themselves to the community.

XXXII. Burden of Proof

Because concubinage is a criminal offense, the prosecution must prove guilt beyond reasonable doubt.

The accused is presumed innocent.

Suspicion, gossip, jealousy, or moral certainty is not enough. The evidence must establish the elements of the crime.

Digital messages, photos, or social media posts may support a case, but they must be properly authenticated and connected to the statutory elements.

XXXIII. Importance of Proper Allegations

The complaint or information should clearly allege which mode of concubinage was committed.

For example, it should specify whether the husband allegedly:

Kept a mistress in the conjugal dwelling;
Had sexual intercourse under scandalous circumstances; or
Cohabited with the woman elsewhere.

A vague allegation of “having an affair” may be insufficient if it does not correspond to the statutory elements.

XXXIV. Concubinage and Marital Infidelity

Not all marital infidelity by a husband is concubinage.

This is one of the most important points.

A husband may be morally unfaithful, may have a girlfriend, or may have secret sexual relations, but criminal liability for concubinage arises only if the conduct falls under Article 334.

Thus, the legal question is not simply: “Did the husband cheat?”

The legal question is: “Did the husband commit one of the specific acts punished as concubinage?”

XXXV. Concubinage and Public Policy

Concubinage reflects the traditional policy of protecting marriage, family honor, and marital fidelity.

However, Philippine criminal law has been criticized for treating husbands and wives differently.

A married woman may be charged with adultery for a single act of sexual intercourse with another man. A married man, however, is liable for concubinage only under more specific and often harder-to-prove circumstances.

This asymmetry is frequently discussed in debates on gender equality, criminal law reform, and the modernization of the Revised Penal Code.

XXXVI. Practical Examples

Example 1: Husband brings his mistress into the family home

A married man allows his girlfriend to live in the house where he and his wife reside or previously resided as spouses.

This may fall under keeping a mistress in the conjugal dwelling.

Example 2: Husband lives with another woman in an apartment

A married man rents an apartment and lives there with another woman as if they were spouses.

This may constitute cohabitation in another place.

Example 3: Husband has secret encounters with another woman

A married man occasionally meets another woman in private.

This may be infidelity, but it is not necessarily concubinage unless there is scandalous sexual intercourse, cohabitation, or keeping of a mistress in the conjugal dwelling.

Example 4: Husband publicly flaunts sexual relationship

A married man openly engages in a sexual relationship with another woman in circumstances that cause public scandal and humiliation.

This may fall under sexual intercourse under scandalous circumstances, depending on the evidence.

Example 5: Woman did not know the man was married

A woman enters into a relationship with a man who falsely represented himself as single.

The husband may still be liable if the elements of concubinage are present, but the woman may have a defense if she truly did not know he was married.

XXXVII. Procedural Considerations

Because concubinage is a private crime, prosecution requires attention to procedural rules.

The complaint must be initiated by the offended wife.

The complaint should include both guilty parties, if both are alive and known.

The complaint must not be barred by consent, pardon, or prescription.

The allegations must fit one or more of the modes under Article 334.

The evidence must prove the statutory elements beyond reasonable doubt.

Failure in any of these areas may result in dismissal or acquittal.

XXXVIII. Relationship to Civil and Family Remedies

Concubinage is only one possible legal route.

The wife may also consider remedies under civil or family law, depending on the facts, such as:

Legal separation;
Support;
Custody and visitation issues;
Property disputes;
Protection orders, if violence or psychological abuse is involved;
Damages, where legally proper.

These remedies are separate from criminal prosecution and may involve different standards of proof.

XXXIX. Key Doctrinal Points

The essential points are:

Concubinage is committed by a married man.
The offended party is the lawful wife.
The husband must commit one of the three acts under Article 334.
Mere infidelity is not automatically concubinage.
The concubine is liable only if she knew the man was married.
The wife must initiate the complaint.
Both guilty parties must generally be included if alive and known.
Consent or pardon by the wife may bar prosecution.
The crime must be proven beyond reasonable doubt.
Concubinage is distinct from adultery, bigamy, legal separation, and VAWC, though the same facts may overlap with other legal remedies.

XL. Conclusion

Concubinage under Philippine law is a specific criminal offense with narrowly defined elements. It is not a general punishment for every act of marital infidelity by a husband. Liability arises only when the husband keeps a mistress in the conjugal dwelling, has sexual intercourse under scandalous circumstances, or cohabits with another woman in another place.

The offended party is the lawful wife. She is the person authorized to initiate the criminal complaint, and her consent or pardon may prevent prosecution. The complaint must generally include both the husband and the concubine when both are alive and known.

Understanding concubinage requires careful attention to the statutory language of Article 334, the distinction between moral wrongdoing and criminal liability, and the procedural rules governing private crimes in the Philippines.