Now this daycare thing is crazy. Does he realize what kind of message he will be sending to D4? Now that would not be the way to phrase the question to him, but I am sure LO knows this is not a good thing to do during this period for D4's emotional being. It will just confuse her more, and she is confused enough.
I like the idea of payback and have some GAL fun. I always use the kids as a guideline. I will not do anything that I would not approve of my kids doing. I still want to be a good example for the kids even when the other person is not.