But I know it's only been a couple months, and this is a marathon.
A couple of months? What about last year? She never recovered, or to my knowledge tried to recover, from her waywardness. You stopped posting, took a trip, had some fun, and you thought things were better........but they weren't, b/c her behavior toward you remained the same. Just b/c you endure a bad situation doesn't mean it is getting better. At heart, you are a positive person. You want to see the good in everyone, and you wanted to believe your MR was slowing improving. It can't improve as long as she refuses to change.
As for her desperation to get the process going, sell the house, etc., it sounds to me as if she needs to be legally single as soon as possible. The excuse she gave you about moving on with your lives is not quite the truth, b/c she could move on without a D. This woman is very, very manipulative.........and I don't think you are the only man she manipulates. I would not put anything past her. Many WW's are in a big rush to get the D pushed through, and I've seen a few cases where they took a big financial loss, and gave up their kids, in order to be with their OM. If OM is married, I can think of at least one way of breaking up his marriage, and then OM marrying your WW after she gets D from you.
None of it makes sense to you, b/c you are using your logical male brain to see her proposal. You aren't thinking like a desperate, emotional, crazy WW who wants to be with OM.
And regarding her comments about the dogs, may I just say as a dog lover myself.........they are pets, not children. Don't start having "custody" battles and "visitations" over a couple of dogs. She doesn't want you having another woman meet your dogs? That is insane!
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!