Do you have access to her phone/email/FB? Any of it? The thing that stood out the most is her saying 'you can date after you separate'. My cheating H gave me that exact same line of bull$hit.
I would seriously advise you to quietly start checking out the above things. Sounds like W is w/AM or thinking about being w/AM.
Also, if you don't want to sell your house, don't. Your W is free to go. Why should you and your s be forced to move?
M & H: 40 M: 5.5 T: 7.5 OW: 7/09 Bomb: 9/09 Sep: 3/10 H files 7/10