My bf and his mom

My bf was on the phone with his mom and she was laughing at how one time he was drunk and hitting me aggressively with a pillow because he thought I hid his phone (the whole time it was at Walmart). She said she has screenshots of it and was laughing. I FaceTimed her because I confined in her to talk to him and to make him stop. I’ve since forgiven him. I never knew she thought it was funny. I’m not sure how to feel about this now.