I think you *should* just let him be done and not worry about who he's with, where he is. I mean, that's how it's going to be when everything is official. Definitely, I would not allow the OW in my home, but beyond that, he's chosen to write you out of the picture, so why shoulder the burden of worrying about him?
I know that's way easier said than done. I'm so sorry about this LO. He is truly screwed up. ((HUGS))
