What can you do? I read your original thread, and it looks like you tacitly agreed that she could date another man while she was married to you, you would sleep on the couch and take care of all of the household stuff, and she gets to eat both kinds of cake.
I know you feel guilty for your past behavior, and you absolutely need to demonstrate to her that you are working on those issues and are cleaning up your life. But there's no reason why you should have to agree to an open marriage, and unless and until you put that boundary down, she's going to continue to rub your nose in it.
I'd suggest that a great place to start would be to take back the marital bed. If she doesn't like your presence there, SHE can sleep on the couch. (You said in your first thread, "Why does the guy always get the couch?" A: BECAUSE HE ALLOWS IT).
