In New York, adultery is one of the legal grounds for divorce under Domestic Relations Law Section 170. It occurs when one spouse engages in a sexual relationship with someone outside the marriage. To file for divorce based on adultery, the accusing spouse must provide evidence of the affair, often through testimony or documentation, since adultery is a fault-based ground. However, using adultery as a ground can complicate the divorce process, as it may lead to more contentious litigation. While it can affect alimony or custody decisions in rare cases, it generally doesn't influence the division of property. Website: https://srislaw.com/new-york-d....ivorce-laws-adultery