so if your son was there for her meeting the it was really you and her that the son didn't want together since he participated in a meeting with all the key players and his mom
if this is the case then it appears that son has a problem communicating with you
no matter how passive/aggressively your obnoxious ex is putting it
maybe couples counseling with your son to learn how to communicate with him better?
It may have been to conveniently place blame on you or it may honestly be because he feels he can't be open and honest with you for whatever reason
be open to that possibility
offer a solution in going to therapy
"son..I was really looking forward to being able to tell you how much I love you and having you hear all the great things I think you are capable of. I feel like we have lost our ability to communicate and I know I need some help to do that better with you. I would like you to go to see xxx with me to help us learn to talk to each other again."
