Sounds like you have a good day planned with the kids. Try not to let Puffy's mom mess up your mood. IMO, she's not going to be much help to you, because she is NOT going to want to look at herself, her history, and her past. And she can't empathize with you without doing that. JMO, but based on what you described, I don't see her looking too closely at herself.
Enjoy the rest of the day with the kids and friends. Try to stay warm!