I agree with Dr. Maureen. This wasn't an isolated incident, I promise you that. This mom was enjoying some down time at your expense--something she does more than you think, I'd bet money on it. I have a 6 year old and am still going through this. At my nephew's party some 8 year old girl kept being ugly to my daughter and her cousin. She was jealous that they were having a good time without her and started saying nasty things, taking toys, splashing them in the face, etc. Since the mom of the 8 year old was my sis in laws friend, sis in law just blew it off. What's more, when my daughter and her cousin swam off, this little girl came up to me and complained that my daughter and cousin were being mean to HER. (Talk about manipulative.) I set this girl straight. Told her to leave my daughter alone, that I had seen how she was behaving, and to not it off. She immediately tattled to her mom and my sis in law. Course I got the dirty look and the "let the kids deal with it on their own and they were all being ugly" comment. I just smiled and held my ground. Long story longer--it doesn't go away. I used to try and be nice. That lasted for about a year and half!!!