I have not read all of Gucci's thread, but I know he subscribes to the Dobson philosophy, which I personally am a fan of and have had success with! It's all about self respect. Of course, Dobson actually advises going into the whole "letting go" thing with the help of a good FT, not without counsel. Having said that, I've done it without counsel, lol.
QS: there IS a way for you to let go and not sell the house. You can stand your ground on the house and still emotionally let her go - and letting her know you are letting her go. She is using that as something to wield over your head, just as the fear of her going off and doing whatever with OM is her power over you...
Get Dobson's Love Must be Tough. You'll be glad you did.