Alienation of affection is a seldom used law and not available everywhere but does apply. There was an interesting recent case in British Columbia / Canada reported on CBC News where the OW was sued in small claims court for costs. I don't think it went much of anywhere but did proceed so perhaps establishes a precedent.
As OwnIt suggests though - is the materiality worth the pain? I think for many of us that we reach a point where we just want it to end and will walk away leaving things on the table. In my case limping because when my ex counter-offered my leg was kicked quite firmly by my lawyer who was frantically whispering "take it take it take it"
On BD H52, W50 T27, M26 S21, D23 BD-9-Mar-16 D-15-Jan-18 Final-19-Apr-18 I am a storyteller. The story may do you no good. But a story is never for the listener. It is always for the one who tells