She sounds like she just isn't ready to let her little baby go. Does he ever say anything to her about it?

Personally, if she wants to play mind games I would just do it right back. She obviously has no intention of ever getting to know you or liking you. So I would probably just pretend like I don't notice how rude she is and just act happy even when she is being a jerk. People who thrive off of others' misery like that can't stand to be ignored. So instead of looking for ways to please this un-pleaseable woman, just play the game her way. She doesn't want to have a convo then call one of your friends right in front of her lol. Then again I'm mean haha