I am filing for divorce. I refuse to live in an open marriage. I will continue in that direction. The only thing which will change that is you stopping the A and showing a willingness, desire and actual work to piece our M back together. If the conditions of MY boundary are not met we will ultimately be divorced. Then do it.
Is there actually something wrong with that boundary?
I certainly don't think so. In fact, I think it's strong, and healthy -- for BOTH spouses.