Thanks Puppy I am thinking of putting everything I feel, and want to communicate to her (boundries, moving, back, OM etc.) in an email and telling her we can discuss all of these things when she gets back from her trip. I am not very good at communicating verbally and the point I am trying to make usually doesnt get across clearly. I will send towards the end of her trip, so she doesnt sit stewing the whole time she is away.
You've got it EXACTLY BACKWARDS, Greg.
The moving back in, you just DO. You're trying to e-mail her ahead of time, so soften the blow, out of fear for her reaction, but you've got to just DO this. Brother, about the one GOOD thing you get out of such a move is her RESPECT for your STRENGTH; if you convey weakness by e-mailing her about it, you're going to get all of the blowback, with none of the respect, and it's not worth it.
As for the timing on the boundary, you WANT her stewing the whole time she is away, if you think she is there with OM (and I believe she is) -- infidelitus interruptus. That's the whole point!