So when W came back yesterday, she seemed nice, no problems. Then we kept texting a bit on logistics. I was doing financial disclosure stuff and asked her to pick up D15 from dance.
When I got home, W and D15 were in the car, D15 was crying and looked very upset. W got out and I asked her what was going on, and she said "Nothing I have (or want) to discuss with you" and kept walking. Gave her a bit of time, daughter didn't want to talk, I asked W again what was wrong with our daughter and she said something about how she doesn't have to tell me, she can talk to her about anything.
Talked to D15, she told me her mom was just in a bad mood. She said I was "using her (D15)" (!!!), and a bunch of other stuff. Not happy at all about W saying I'm "using my daughter" but I can't confront her on that because D15 asked me not to say anything to her mom.
W wanted to read to D5, she wanted to watch TV. W was not happy, told her to sleep in her bed, D5 didn't want to, I encouraged her to read with her mom but she was having none of it. She ended up sleeping in the bed.
She disappeared for a while, I think she stepped out of the house to talk on the phone and walk. No idea who.
This morning I woke up W, everybody was late. She was in a better mood, told D5 to make sure she said good morning to me and to show me a toy catalog with some things she was excited about. Again, pleasant and no problems, completely different from last night. During her "trip" she had her hair done, I told her it looked nice (maybe I shouldn't have?). She said thanks.