Did I overreact with speaking to my daughters principal

My daughter got an IEP this year. She's 15 and was was diagnosed with autism over the summer. She's in credit recovery because she failed two classes and needs to recover said credits. How credit recovery works is they go during 7th hour and work on the class online. There's a teacher in there and I'm not sure if she's an actual teacher or if she's just someone in there to babysit. My daughter got very upset and overwhelmed because the teacher in there was yelling at all of them.

There was some rumors going on about her son and his girlfriend at the school and she was yelling at this class about people starting rumors about her kid and my biggest issues was her saying "If you want to start a rumor say he's a virgin because my son IS a virgin! He doesn't even have a door on his bedroom!" She was yelling at these kids about her son being a virgin and how she tracks where he goes and he doesn't even have a door. Am I crazy or is that a little inappropriate. If my mom did that I would be mortified.

I spoke to the principal and I even said I'm sure she's stressed and I can't imagine it's fun to feel like your kid is being targeted, I just don't find that appropriate. I even offered if they are short staffed I would be fine to come in and volunteer or sub since I used to sub in the past since I'm sure everyone is overwhelmed. My husband said I way overreacted. It overwhelmed our daughter. It would be different if she was scolding them about behavior issues but I think there's a different way to handle rumors about your kid and that isn't it. I don't work with kids though so feel free to give me insight. Did I overreact?