In the Philippines, marriage is regarded as an "inviolable social institution." Consequently, the law provides both criminal and civil mechanisms to protect the sanctity of the marital bond. When a spouse strays, the offended party has several legal avenues, though the Philippine legal system famously maintains a "double standard" regarding how infidelity is treated based on the gender of the erring spouse.
I. Criminal Actions: The Revised Penal Code
Infidelity is not merely a private grievance in the Philippines; it is a crime against chastity. However, the law distinguishes between Adultery (committed by a wife) and Concubinage (committed by a husband).
1. Adultery (Article 333)
Adultery is committed by any married woman who has sexual intercourse with a man not her husband, and by the man who has carnal knowledge of her knowing her to be married.
- The Standard: A single act of sexual intercourse is sufficient to constitute the crime of adultery.
- Liability of the Third Party: The paramour is equally liable if he knew the woman was married at the time of the act.
- Penalty: Prision correccional in its medium and maximum periods.
2. Concubinage (Article 334)
A married man commits concubinage if he performs any of the following:
- Keeps a mistress in the conjugal dwelling;
- Has sexual intercourse with a woman who is not his wife under scandalous circumstances; or
- Cohabits with her in any other place.
- The Difficulty of Proof: Unlike adultery, a single act of sex is not enough to convict a husband of concubinage. The offended wife must prove one of the three specific conditions mentioned above, which carry a much higher evidentiary threshold.
- Liability of the Third Party: The concubine is punished only with destierro (banishment from a specific radius), which is a significantly lighter penalty than that imposed on a male paramour in an adultery case.
II. The Requirement of a Private Complaint
Under Article 344 of the Revised Penal Code, these crimes cannot be prosecuted except upon a complaint filed by the offended spouse.
Crucial Rule: The offended party cannot institute a criminal action without including both the guilty spouse and the third party (the paramour or concubine), if they are both alive. You cannot choose to sue only the third party and "forgive" the spouse within the same criminal filing.
The Effect of Consent or Pardon
A criminal action for adultery or concubinage will be barred if:
- The offended spouse consented to the infidelity.
- The offended spouse has expressly or impliedly pardoned the offenders. (Example: Continuing to live and sleep with the spouse after discovering the affair is often deemed an implied pardon).
III. Civil Remedies and the Family Code
While criminal cases aim for imprisonment, civil actions seek to change the legal status of the marriage or obtain financial compensation.
1. Legal Separation (Article 55, Family Code)
Sexual infidelity or perversion is a ground for legal separation.
- Effect: The spouses are entitled to live separately, and the absolute community or conjugal partnership is dissolved and liquidated.
- Limitation: The marriage bond is not severed; neither party can remarry. The "guilty" spouse is also disqualified from inheriting from the innocent spouse by intestate succession.
2. Declaration of Nullity (Article 36, Family Code)
While infidelity itself is not a ground for annulment, it is often used as a "manifestation" of Psychological Incapacity. If the cheating is habitual and stems from a deep-seated psychological inability to comply with the essential marital obligations of fidelity and mutual support, the marriage may be declared void from the beginning.
3. Petitions for Damages
Under the Civil Code of the Philippines, an offended spouse may sue the third party for damages:
- Article 26: Every person shall respect the dignity, personality, privacy, and peace of mind of his neighbors and other persons.
- Article 21: Any person who willfully causes loss or injury to another in a manner that is contrary to morals, good customs, or public policy shall compensate the latter for the damage.
The Supreme Court has upheld that a third party who intrudes into a marriage and disrupts the family solidarity can be held liable for moral damages.
IV. Summary Table of Differences
| Feature | Adultery (Wife) | Concubinage (Husband) |
|---|---|---|
| Basic Requirement | A single act of intercourse. | Specific conditions (cohabitation, scandalous sex, or keeping in the home). |
| Penalty for Spouse | Imprisonment (Prision correccional). | Imprisonment (Prision correccional minimum/medium). |
| Penalty for Third Party | Same as the wife. | Banishment (Destierro). |
| Evidence | Easier to prove (direct or circumstantial evidence of sex). | Harder to prove (requires proof of "scandal" or "living together"). |
V. Strategic Considerations
It is important to note that criminal convictions for adultery or concubinage are notoriously difficult to secure because "beyond reasonable doubt" is a high bar for acts usually done in private. Many offended spouses utilize the threat of a criminal case as leverage for a more favorable settlement in civil cases or for the voluntary separation of properties.
Furthermore, the "Anti-Violence Against Women and Their Children Act" (RA 9262) has increasingly been used by wives. The courts have ruled that the mental and emotional anguish caused by a husband’s blatant infidelity can constitute Psychological Violence, providing a faster route for Protection Orders (BPO/TPO/PPO) compared to a standard concubinage case.