We're not supposed to interrogate the kids what happens at the OP's home, but I don't think there's anything wrong with asking, "how's your eye feeling,.D? It must have hurt when the door hit you.?" She may volunteer information.
that's a good idea
I had to rescue my Ex today due to S5 being sick. D3 said when I was leaving, "I want to go home with you Daddy!" Her mom said, "what, you don't want to go home with me?" Waif. I felt like saying, "the children aren't responsible for your feelings," but I didn't. It makes me feel good that our D loves me that much, but also a little sad.
Yes the guilt bombs are horrible.