I think you're being far more gracious than she deserves.
So you're doing a good job.
Especially in not resorting to your old habits and withdrawing.
Big props to you for that!
I don't personally like the week on/week off thing with the kids but if it works for ya'll, good. I like the idea of the dinners. If she goes for it at all, she might only go for one night, though.
I don't know what else to say.
You got screwed on the house deal and I think they ALL suck for having done that to you.
If your wife keeps talking about wanting to get back together but making an excuse that she's made a plan with OM, out her to him (I may have interpretted that statement wrong, though).