Anonymous wrote:The mom already knows other kids can't stand him. She probably isn't that fond of him herself. You can decline politely and she will understand. No need to make it more awkward.
Anonymous wrote:Talk to the Teacher if this is a problem in school. the Teacher should do her professional duty and manage the classroom.
OP, you should not be friends with the Mother unless you two can be friends and it doesn't involve the kids. Your social life is not important enough for your son to be bullied (or whatever this is)