It all depends on how your agreement/decree was worded in regard to alimony. If it states it shall be paid until cohabitation or remarriage or death, with no time length, then it will have to go to court to have it changed. This is difficult. You really have to have a good reason for modification.
I’ve seen agreements that state alimony shall be paid for a certain amount of years (usually 1/2 the length of the marriage). My friend didn’t have that statement in his agreement (they ‘shared’ a lawyer), so he is paying the alimony until she dies, remarries or cohabitates. When he went to court to contest, he only got it reduced a bit.
This is why I always say: DO NOT SHARE A LAWYER…GET YOUR OWN LAWYER. DO NOT SIGN SOMETHING JUST TO GET OUT OF THE HOUSE. DO NOT SIGN ANYTHING YOU’RE NOT WILLING TO LIVE WITH FOR A LONG TIME.
Sorry for shouting…it’s just I see so much of that here and in my own everyday life. People want out and they’ll sign anything. Then they realize the deal they signed stunk—but it is signed and it’s binding. The money most could have spent on a lawyer would have saved most folks in the long run. “I can’t afford a lawyer”…they are expensive, but sometimes, you can’t afford NOT to have one. Find a way to pay for one. Beg, borrow, charge it.