Sara, I'm going to be brief and direct because although I know you are hurting terribly right now (you know I've been there and stayed in a M with an ongoing affair and lying and cheating for 2 years), but there are long-term concerns here. Have you seen a L? Do you have an IC?
You can't waive child support on behalf of your children. Just the thought tells me that you need to talk to a L.
You are trying to do everything yourself, but you know what they say about the doctor who treats herself...
Get the professional help you need. Don't buy a house until you know the legal ramifications in the state you live in now. Don't set any terms or make any decisions. This is extremely complicated and should not be attempted at home.
(((((Sara)))))
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17