This is an AU where walks out of the family after hurting Todoroki, which doesn't help with their situation with Endeavor. She comes back uninvited with only Endeavor to care and Rei acts defenseless. Shoto, Natsuo, and especially Fuyumi have to remind their father of what they had to do with her. Shoto explained to Endeavor that Rei didn't really care about him, the reason of his eye injury, and not believing what he's hearing at the moment, he hurts Shoto and Rei doesn't want to help, nor can she really do anything anyways, and walks off.
This AU obviously goes for the rest of the parts. Hope y'all are happy now for the explanation.