Can I sue my live-in partner for cheating?

Asked by: Lauriane Will  |  Last update: May 26, 2026
Score: 4.5/5 (38 votes)

You generally cannot sue your live-in partner solely for cheating in most places, as infidelity isn't usually a standalone crime or basis for a lawsuit, but it can significantly impact divorce proceedings, alimony, or child custody in fault-based divorce states or if it rises to extreme conduct like Intentional Infliction of Emotional Distress (IIED) (IIED), says Beal Law Firm and Lonich Patton Ehrlich Policastri, respectively. Your options depend heavily on your state's laws, but focusing on divorce, property division, or even a claim against the third party (in rare cases like alienation of affection suits) are more common paths, requiring a consultation with a family law attorney for personalized advice.

Can you sue the person your partner cheated with?

You generally can sue someone for intentional infliction of emotional distress if you can prove the following elements: The defendant acted intentionally or recklessly. The defendant's conduct was extreme and outrageous. The conduct was the cause of severe emotional distress.

What evidence is needed to prove cheating?

Courts typically accept seven key types of infidelity evidence when properly obtained: digital communications including text messages and emails with authenticated timestamps, credit card statements revealing suspicious charges, hotel receipts and travel documentation, photographs and surveillance footage captured in ...

What states can you sue for cheating?

If you are in the United States, yes, you can sue the party that committed adultery with your spouse in six states: Hawaii, North Carolina, Mississippi, New Mexico, South Dakota, and Utah.

What to do legally when your spouse cheats?

You can file for divorce on the grounds of adultery and cruelty. If adultery is proven, you are not obligated to pay alimony. You can also file for child custody if required. Additionally, if you have faced any form of domestic abuse, you may consider filing a domestic violence case.

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37 related questions found

What is the 80/20 rule in infidelity?

The "80/20 rule cheating" concept, popularized by movies like Why Did I Get Married?, suggests people cheat to find the missing 20% of fulfillment they lack, overlooking the 80% good in their primary relationship, often pursuing someone who offers just that specific "missing piece" (e.g., attention, excitement), leading to the temptation to trade substantial happiness for temporary fulfillment, which usually backfires, says Medium. It's a way some rationalize infidelity, focusing on deficits rather than the overall relationship's value, which can be a self-sabotaging pursuit of an illusionary 100%, notes WordPress.com and Medium. 

Is a wife entitled to half if she cheated?

Generally, cheating doesn't automatically prevent a spouse from getting half the marital assets in a divorce; courts focus on fair (equitable) distribution, not punishment, but infidelity can matter if marital funds were spent on the affair (marital waste), potentially leading to reimbursement, and some fault-based states might consider it. Most states prioritize an equal division of marital property, meaning the unfaithful spouse still gets their share unless specific financial misconduct occurred, notes Right Lawyers and Sarieh Family Law. 

Can you sue someone for emotional distress if they cheat on you?

Intentional Infliction of Emotional Distress.

You would have to prove that by cheating, your spouse (1) acted intentionally or recklessly; (2) his or her conduct was extreme and outrageous; and (3) his or her conduct caused (4) severe emotional distress.

What states have the Homewrecker law?

How many states have homewrecker laws? Alienation of affection lawsuits can still be brought in at least five states: Mississippi, Hawaii, North Carolina, South Dakota, and Utah, according to a 2016 Duke Law Journal article.

What is infidelity vs adultery?

Infidelity is the broad term for breaking trust in any committed relationship (emotional or sexual), while adultery is a specific type of infidelity involving sexual intercourse with someone other than your spouse, often carrying legal or formal connotations. Think of infidelity as the umbrella term for any betrayal (emotional affair, inappropriate intimacy) and adultery as the specific act of sexual betrayal within marriage, making adultery a form of infidelity, but not all infidelity is adultery. 

Are text messages enough to prove adultery?

Adultery can be proven using circumstantial evidence. What type of evidence might suffice to prove adultery? Your spouse's own statements, in text messages or e-mails, would potentially be powerful evidence as to whether he or she had sex with the new person. But the exact wording of the messages is very important.

What is emotional cheating?

Emotional cheating is forming a deep, intimate emotional bond with someone outside your primary relationship, sharing vulnerability, and meeting needs that should be for your partner, often involving secrecy, creating emotional distance from your spouse, and eroding trust. It's characterized by unhealthy boundaries, where you invest emotional energy, time, and support into this other person instead of your partner, even without physical intimacy.
 

Can you accuse someone of cheating without proof?

Not generally. So long as the statement is about a matter of public interest and is made in a way such that it cannot be proved true or false, the statement is protected from defamation actions.

How much does it usually cost to sue?

Average lawsuit costs vary dramatically, from around $1,000–$10,000 for small claims to tens of thousands for complex personal injury or contract disputes, with median figures ranging from $43,000 (auto) to $122,000 (malpractice) in serious civil cases, depending heavily on complexity, attorney fees (hourly, retainer, or contingency), discovery, experts, and duration.
 

Can you sue someone for ruining your relationship?

Although alienation of affection defendants are usually a spouse's lover, you can sue anyone thought to be responsible for the breakup, including counselors and therapists, clergy members, or family members.

What evidence is needed for adultery?

To prove adultery in a divorce, you generally need to show both opportunity and inclination, using strong circumstantial evidence like text messages, emails, financial records (hotel bills, gifts), social media posts, or testimony, often gathered by a private investigator, to prove the relationship went beyond mere emotional connection to include sexual intercourse, with courts usually requiring "clear and convincing" proof.
 

In what states is adultery a felony?

It's charged as a misdemeanor in most states but qualifies as a felony in Michigan, Oklahoma, and Wisconsin. However, charges are rarely filed, and convictions are even rarer, but adultery in these states is highly likely to impact the outcome of divorce cases.

Can you be sued for being a homewrecker?

Former U.S. Sen. Kyrsten Sinema is being sued in North Carolina under one of the nation's most controversial and little-known civil laws — a so-called “homewrecker” statute that allows a spouse to sue a third party for allegedly breaking up a marriage.

Can I sue for being cheated on?

No, adultery is not currently a civil tort in California. In the past, there were adultery laws that allowed people to sue for infidelity. Many states also used to criminalize adultery. Today, however, unfaithfulness in a marriage is not a crime or legal tort in the State of California.

Can I sue my boyfriend for breaking up with me?

Yes, but you can only sue in rare situations in which your ex's behavior was really bad and the distress you suffer is severe. In some states, you must have physical symptoms to move a case forward. You do not need to have suffered physical abuse, but a standard breakup is not enough.

What proof do I need for emotional distress?

Proving emotional distress involves gathering evidence like medical records (diagnoses, therapy notes), personal journals detailing symptoms (anxiety, sleep loss), witness statements (family, friends describing behavior changes), and sometimes expert testimony from mental health professionals, all to show a direct link between another's actions and your severe, lasting emotional suffering that often manifests with physical symptoms like fatigue or headaches. 

What are the four behaviors that cause 90% of all divorces?

The four behaviors that predict divorce with over 90% accuracy, known as the "Four Horsemen of the Apocalypse," are Criticism, Contempt, Defensiveness, and Stonewalling, identified by relationship expert Dr. John Gottman; these destructive communication patterns erode respect and connection, leading to marital breakdown. 

Do judges care about infidelity?

California is a no-fault divorce state, which means that the court doesn't consider adultery, betrayal, or personal misconduct when dividing community property. Whether one spouse had an affair or not, the assets earned during the marriage are generally split 50/50.

What is the #1 divorce cause?

The number one reason for divorce cited in surveys is a lack of commitment, with infidelity, excessive arguing, growing apart, and financial problems also being major factors, though money issues often stem from poor communication and teamwork rather than just lack of funds. Other significant contributors include lack of communication, addiction, unrealistic expectations, marrying too young, and abuse.