Jenny explained the WTF better than I did. It must have been opposite day yesterday because your W really seemed to have the sitch turned around. I guess you and I are alike in the fact that we try to let our WAS see and spend as much time as possible our Ds everyday. I have never told H he couldn't spend time w/ them when he wanted to. However, when it is his time I leave them alone unless he invites me.
I would say your need to not invite your W to do anything together. If she invites then ok. I stopped inviting my H to eat w/ us. H normally will eat dinner her, but it is after we have eaten as I don't wait for him to get here.
You told W you would stop by w/ D today, so do that.