What if my ex-wife moves in with her boyfriend and never remarries?

Cohabitation is also a reason to cease permanent alimony. The cohabitation has to be of a long-term or permanent nature with your ex-wife and her boyfriend sharing living expenses together. Staying overnight by either party a few times a month is generally not enough. This becomes a very touchy subject, because often times ex-spouses will intentionally not remarry in order to keep getting support payments, even though they have found a new life long companion.