Sounds like xW is starting to regret her decisions. Why do you think she left and end things so quickly (OM?)?
Keep doing what you are doing. Let her guess what you are up to. Sound like everything is perfectly okay when you talk her or to D5 (assume your xW is listening in; BTW do you share custody, even a basic schedule?). Your message should be that you have moved on with your life and it is wonderful.
If she is fishing to try to get back together, make her do the work.
Having been here a while I wish they would really just decide and then leave us alone. It becomes a cat playing with a mouse if we even let on that we still miss them. And ironically that drives them away again. Luck.
