Wow...okay. He's been so rotten for so long, but we'll see I guess.
What do you think about me at least telling him my boundaries and that continued contact with OW is a dealbreaker for me? I don't want to talk in detail about his A, but I want him to know where I stand.
Only when he says he wants back in the marriage. Right now, in his current state, he's not going to care.
That doesn't mean you can't have some boundaries in your OWN HOME, but those should be laid out when they happen, not done in some grand pronouncement. For example, if you catch him on his cellphone, texting, you can say "I certainly hope that's not your girlfriend that you're texting. That would be incredibly disrespectful, and I'm not going to tolerate it in my own home."