Is it not possible to link the sale of your house to a D actually being finalized?

I think that is what i thought i was doing in September when we finalized our interspousal agreement. We went to the mediator (for the 2nd time) a week after he told me he couldn't do this anymore and that we "needed" to get D. So, of course, when we go there, i am thinking that he has made a firm decision regarding the D. Now, though, he seems to be saying differently. And i don't know if he is saying it in order to manipulate me into not selling now, or if he is being sincere. My point was, in September, that if we were getting D, then i wanted the house to be sold. Which i tried to remind him of today. He said something to me like "oh, i'm not going to talk about what happened all those months ago." What? Isn't that relevant to what we are talking about? My feeling/thinking is this: if we are getting D, then we are selling the house. If there is a chance to save this M, then i am willing to hold off on selling the house. But, he needs to make a decision. He goes back and forth. And if he thinks that there is a chance for this M to work, then he needs to start doing something about it...like regular dates, counseling, etc. Something to point in a positive direction. Otherwise, we are selling the house. B/c i'll be damned if he is going to be living there, having his bimbo there. Uh-huh, no way in hell!