I never thought I would be here

[TrentC]

With respect to that yes, with what my wife is choosing she is being selfish. Should my daughter suffer for this - No... Forcing my wife out of the house will likely hurt my daughter and that's where I am at. It's not for me but for my daughter...

The best thing for your daughter is for mom to sit her down and explain why she is leaving. And you need to be there so it doesn't become a case of "we decided to...".

You do not deserve to become a doormat for the sake of your daughter. All you're showing her is that it's okay for people you "love" to disrespect you. (And she will find out the whole story, someday.)