Adultery is one of the recognized grounds for divorce in New York, but it affects the case far less than most people expect. Clients calling Roven Law Group often assume that proof of an affair will shift the property division, increase the maintenance award, or change a custody outcome. In the vast majority of New York cases, none of that is true. The legal reality of adultery in a New York divorce is narrower than the cultural reaction to it, and understanding the actual rules helps clients make better decisions about whether to raise the issue at all.
Here is what adultery does and does not do in a New York matrimonial case.
Adultery Is a Recognized Ground Under Domestic Relations Law Section 170(4)
New York law has long recognized adultery as a fault ground for divorce. Domestic Relations Law section 170(4) defines it as the commission of an act of sexual or deviant sexual intercourse, voluntarily performed by the defendant, with a person other than the plaintiff, after the marriage. The plaintiff has to prove the act actually occurred, which historically required corroborating evidence beyond the testimony of the spouse alleging it.
The proof requirement is one of the reasons adultery is rarely used as a ground today. The plaintiff cannot simply testify that they believe an affair happened. Independent corroboration, such as photographs, hotel records, witness testimony, or admissions, has traditionally been required, and meeting that standard in court is harder than it sounds.
Why Most New York Divorces Do Not Use the Adultery Ground
Since 2010, New York has allowed no-fault divorce under Domestic Relations Law section 170(7). Either spouse can obtain a divorce by stating under oath that the marriage has been irretrievably broken for at least six months, and the other spouse cannot contest that ground. The no-fault provision eliminated the need to prove misconduct in nearly every case.
Filing on adultery rather than on the no-fault ground produces several practical disadvantages. The plaintiff carries the burden of proof, the case becomes more invasive, the litigation runs longer, and the legal fees climb. There are also affirmative defenses to an adultery claim under Domestic Relations Law section 171, including condonation, which means the wronged spouse forgave the conduct, and a failure to bring the action within five years of the discovery of the affair. These defenses give the other side leverage that a no-fault filing simply does not create.
Adultery and Equitable Distribution
The most common assumption clients bring through the door is that adultery will produce a larger share of the marital property for the wronged spouse. New York law generally rejects that result. Domestic Relations Law section 236(B)(5)(d) lists the fourteen factors a court considers when dividing marital property, and marital fault is not on the list except in narrow circumstances.
The exception is conduct so severe that the courts describe it as “egregious.” New York courts have applied this label to extreme cases, including attempted murder of a spouse and severe physical abuse. Adultery, even prolonged or public adultery, almost never qualifies as egregious conduct under New York case law. A spouse who hopes the affair will result in a larger share of the marital home or retirement accounts is usually disappointed.
Adultery and Spousal Maintenance
Spousal maintenance under Domestic Relations Law section 236(B)(6) runs through a presumptive formula based on income, with statutory factors that allow the court to adjust the result. Marital fault is not an enumerated factor, and adultery does not directly increase or decrease the maintenance award.
There is one indirect way adultery can matter. If the spouse who had the affair spent significant marital funds on the relationship, including travel, gifts, or housing for the third party, the court can treat those expenditures as wasteful dissipation of marital assets. Wasteful dissipation is a recognized factor in equitable distribution under section 236(B)(5)(d)(11). The recovery in those cases is the value of the dissipated funds, not a punitive adjustment for the affair itself.
Adultery and Child Custody
Custody decisions in New York are made under the best interests of the child standard. The fact that a parent had an affair, by itself, is generally not relevant to that analysis. New York courts have repeatedly held that adult sexual conduct between consenting adults outside the marriage does not, on its own, affect a parent’s fitness.
The exception is when the affair has a direct impact on the children. If a new partner has a history of violence or substance abuse and has access to the children, that fact matters. If the children were exposed to the affair in a way that affected their welfare, the court takes notice. The conduct itself is rarely the issue. The effect on the children is.
When Adultery Does Influence a Case
Adultery occasionally affects a New York divorce in practical ways that fall outside the legal rules. A spouse who feels betrayed may be less willing to settle, which extends the case and increases costs for both sides. The discovery of an affair sometimes produces evidence of dissipation that would not have surfaced otherwise. A prenuptial or postnuptial agreement may contain a fidelity clause with specific consequences for adultery, which the court will enforce if the clause is otherwise valid.
These are real considerations, but they are matters of strategy and contract rather than statutory rules.
How Roven Law Group Advises Clients on Adultery Issues
Adultery rarely changes the legal outcome of a New York divorce, but it changes how clients feel about the case, which matters for strategy. Roven Law Group helps clients separate the emotional weight of an affair from the legal questions actually in dispute, identify the financial issues that do affect the result, and avoid the cost and exposure of unnecessary fault litigation. The firm represents clients in matrimonial proceedings across Manhattan, Brooklyn, the Bronx, Queens, and Staten Island. Schedule a consultation to discuss how the facts of your situation should shape the approach.