No you’re not overreacting. Did you ask him why exactly he felt the need to do that? And how did you find out?
Have you asked why?
I asked why he added her and he said he thought maybe she was in touch with their son. I found out because she showed up in my people you may know and he was in the mutual friends section.
No I would be pissed too! Ugh 😩 I’m sorry you’re having to go through this!