Quit trying to make sense of her actions or thoughts. It is impossible. They won't make sense to anyone but her right now. Try to not have expectations about what she's going to do, then you won't sit around wondering why she did it. Stick to the basics - short discussions about kids only are fine. Respond if necessary, but otherwise ignore. And yeah, don't ask about her personal plans anymore. It was a slip-up, but you recognize it so know better for next time.
Me 47 W 42 T 24 yrs M 18 yrs W living with OM BD1: 3/7/2015 (A with OM#1) BD2: 4/11/2015 (A with OM#2, W moves out) WW filed for D, papers received 9/18/2015. Meeting to determine child custody 9/29/2015.