His ex's son messages him

My boyfriend and I have been together for 8 months. He told me he left his last relationship because the girl was toxic, a psychopath, and a shit mother. So if she was so terrible I would think he would cut off her and anyone to do with her. But her son who's 14 emailed my boyfriend through his school email. He did tell me. The kid was just venting about his mom destroying his pokemon cards he had been collecting for 8 years including ones his dad gave him(the dad passed away) because she got mad at him. That he was depressed. I've seen the emails and my boyfriend mainly told him he was so sorry she did that and he knows it may not help but in less than 4 years he will be 18 and can leave. He said he was just trying to be helpful but am I crazy for this bothering me🥲. I'm just saying if she's so crazy why risk pissing her off by emailing her kid behind her back?