The thing is if he has TikTok he will actively seek out / look for negative comments about his mum; it's only natural that he would especially as she is openly discussing it with him.
It's clear she won't stop posting and do you know what, that is her perogative, however she could absolutely minimise the negativity by posting privately (so that she could have only the sunshine and flowers comments from her trusty followers). This would though mean that she didn't get the views that validate her so she won't do it.
I really do worry about the impact that this will have on her childs mental health as he grows up. High school kids are savage and the minute they find his mums accounts I feel he will be subjected to ridicule in which he may not feel able to discuss with his mum because she openly discusses the impact the "trolls" are having on her.
I've said it before, if she isn't going to stop posting then she just needs to "own" her content and accept (not except
) that people will have opinions and just carry on without the "woe is me" and the car rants. Plenty of other creators get negative opinions about a) their appearance and b) what they do and they just wittily clap back or ignore (Claireabella and Becky Mills are 2 that immediately spring to mind)