KIds are adults so he has no obligation for support unless they are fulltime college students.

Alimony cannot be renegotiated per our agreement (and the incomes that we based it on have not changed).

He's just a selfish jerk. I will have to sit down with each child and explain the financial facts of life and what "alimony" is for and what it means. Hate to do this because it makes them anxious to feel pulled between us, but I cannot allow him to give them the impression that he is helping them when he is NOT, or the impression that I am somehow ripping off their dad by collecting alimony.