Gonna throw my 2 cents at the questions you asked.
1. Yes, and in my case when you least expect it. My W was full steam ahead with D and was done. After first visit with mediator she went from D to LS. After the next visit that changed to i'm having second thoughts. After the last visit she went to wanting to try to work things out to now being convinced we can work things out. To say I was shocked by all this is the understatement of the year.
2. I think pride and not knowing how can play into it. W has told me that when her mind changed it shocked her and confused her as to how it had changed. She also said that a big piece of the confusion was how she had been so cold and convinced that we were done for the previous 6 months. She needed to make sure the new feelings were real.
Don't know if that answered your questions but hope it helps some.
