Ive been trying to think of a nice way to put this but haven't been able to find the words. You said she isn't exclusive,she is dating other guys. She very well could be sleeping with all of them. This one guy stands out to her because he won't sleep with her because she is married.
I remember I used to hold on to every kind or easy moment,giving myself false hope. I think you need to figure out if this is what you you want to keep going through. Your wife comes across as a gold digger. She only wants money out of you. Who is to say your parents will have that kind of money to give later? Why does she think after what she has put you through she should get anything further down the road? Yes her parents gave and she was just as responsible for losing the house as you were. Yes you were trying to keep reality from here but any adult with common sense would have wanted to know what was going on and helped out. You both lost the money, not just you.
Food for thought. Kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory