Adultery: Meaning, Marital Infidelity, Relationships, and Law

Adultery may involve:

• one secret sexual encounter;
• a continuing extramarital affair;
• sex with another married person;
• sex with an unmarried person;
• conduct that violates a marriage’s exclusivity agreement.

Simple examples include:

• Adultery usually involves at least one married person.
• Adultery may seriously damage trust within a marriage.
• Different religions define adultery in different ways.
• Adultery is not identical to every form of cheating.
• Whether adultery has legal consequences depends on the applicable law.

Common expressions include:

• commit adultery;
• accuse someone of adultery;
• admit adultery;
• discover adultery;
• laws concerning adultery;
• divorce based on adultery.

Examples include:

• The spouse admitted committing adultery.
• The marriage ended after the discovery of adultery.
• The historical law imposed penalties for adultery.

The related adjective is adulterous:

• an adulterous relationship;
• adulterous conduct;
• an adulterous affair.

A person who commits adultery may be called an adulterer, although that term often sounds accusatory or judgmental.

Adultery is narrower because it traditionally involves marriage and sexual activity outside that marriage.

Infidelity may include:

• sexual contact;
• romantic involvement;
• secret dating;
• intimate online communication;
• emotional attachment;
• concealed use of dating apps.

Therefore, adultery is generally a form of infidelity, but not every form of infidelity is adultery.

A person may be accused of cheating for:

• kissing someone else;
• sending sexual messages;
• maintaining a secret romantic relationship;
• having sex outside the relationship;
• breaking an agreed boundary in an open relationship.

Adultery usually refers specifically to extramarital sexual activity. Cheating can occur between unmarried partners and may not involve sex.

Adultery usually involves a married person having sex outside marriage.

Fornication traditionally refers to consensual sex between unmarried people.

For example:

• Two unmarried adults having sex may traditionally be described as committing fornication.
• A married adult having sex with someone outside the marriage may be described as committing adultery.

Religious and historical texts may use these terms differently, so context is important.

Consensual activity within those agreed boundaries is not usually considered cheating by the spouses. However, some religious, cultural, or legal definitions may still classify extramarital sexual activity as adultery.

A person may also violate an open-marriage agreement by:

• hiding a partner;
• ignoring safer-sex rules;
• becoming involved with a prohibited person;
• exceeding agreed emotional boundaries;
• lying about an encounter.

The existence of nonmonogamy does not mean that the relationship has no rules.

It may involve:

• intense emotional intimacy;
• romantic messages;
• secrecy;
• prioritizing another person over the spouse;
• discussing private marital matters;
• concealed future plans.

An emotional affair may be considered infidelity, but it is not necessarily adultery under the traditional sexual definition.

Nonconsensual sexual contact should not be described merely as adultery. It may involve sexual assault, rape, coercion, exploitation, or another form of abuse.

A married person always retains the right to refuse sex, including sex with their spouse. Marriage does not create permanent sexual consent.

Consent must be voluntary, specific, continuing, and reversible in every sexual encounter.

Possible effects include:

• loss of trust;
• anger;
• grief;
• humiliation;
• anxiety;
• relationship conflict;
• separation or divorce;
• concerns about sexual health.

Not every marriage defines exclusivity in exactly the same way. Clear communication can help spouses understand what each considers unacceptable behavior.

Relevant concerns may include:

• STI exposure;
• delayed testing;
• unprotected sex;
• inaccurate health information;
• unintended pregnancy;
• violation of safer-sex agreements.

A spouse who has had outside sexual contact may need to communicate honestly and seek appropriate STI testing. The specific sexual activities and protections used determine risk more accurately than the label adultery alone.

This can create complex emotional, familial, financial, or legal questions involving:

• biological parentage;
• disclosure;
• child support;
• inheritance;
• marital responsibilities;
• family relationships.

The interests and well-being of a child should not be reduced to moral judgment about the adults’ behavior.

Cultural attitudes may influence:

• family responses;
• social reputation;
• expectations of forgiveness;
• divorce decisions;
• gender roles;
• community discipline.

Standards are often applied unequally. In some societies, women accused of adultery experience harsher judgment or punishment than men accused of similar conduct.

Educational discussion should explain cultural and religious beliefs without treating one standard as universal.

Depending on the jurisdiction, it may be:

• legally irrelevant to divorce;
• considered when granting a fault-based divorce;
• relevant to financial or custody disputes under limited circumstances;
• prohibited by a criminal statute;
• addressed mainly through religious or social rules.

Because laws vary and may change, legal questions about adultery require the current law of the relevant jurisdiction.

An allegation of adultery should not be presented as proven fact without reliable evidence or adjudication.

People should avoid:

• spreading unsupported rumors;
• publishing private messages;
• sharing intimate images;
• exposing someone’s sexual history;
• presenting an allegation as a proven fact;
• using adultery claims to encourage harassment.

Relationship betrayal does not justify violence, threats, stalking, or nonconsensual image sharing.

Adultery and fornication are identical.
Traditional definitions distinguish them according to marital status.

Adultery always involves two married people.
Only one participant must be married under many common definitions.

An emotional affair is automatically adultery.
It may be infidelity without meeting the traditional sexual definition.

Adultery proves that sexual assault did not occur.
Sexual violence must be identified according to consent, not marital status.

Adultery has the same legal meaning everywhere.
Legal definitions and consequences vary by jurisdiction.

1. Adultery traditionally means sexual activity between a married person and someone outside the marriage.
2. Adultery is generally considered a form of marital infidelity.
3. The couple discussed whether adultery should be grounds for ending the marriage.
4. Adultery differs from fornication in traditional religious and historical usage.
5. An emotional affair may be infidelity without necessarily being adultery.
6. Adultery within an open marriage may be defined differently by the spouses, religion, and law.
7. An allegation of adultery should not be reported as a proven fact without evidence.
8. Adultery may create concerns about trust, STI exposure, and pregnancy.
9. Adultery should not be confused with nonconsensual sexual activity.
10. Accurate discussion of adultery should consider marriage, consent, relationship agreements, culture, and law.

The term does not fully explain consent, emotional involvement, safer-sex practices, or the couple’s relationship agreement. Those issues must be considered separately.

Accurate sexuality education distinguishes adultery from sexual violence, fornication, emotional infidelity, and consensual nonmonogamy. It also emphasizes consent, honest communication, sexual health, privacy, and nonviolent responses to relationship betrayal.