I don't think we can deal too much with theoreticals here... but I will say that the last time my x wanted to talk (it was get together for tea, an email)I said I don't think so, this is too emotional still for me, if there is something on your mind let me know what it is. Turns out he had a baby on the way with the ow and we weren't even divorced and his family was telling him he had to tell me. THAT I didn't want to know in person. Whatever else he might have said at that point did not matter.
Does this help??
By the way, I read your sitch, just the first post, you like to get married after one long talk huh? Just an observation. Hope I did not misread. If so sorry. Wonder