Is it normal to send a happy birthday message to your son's ex-girlfriend
My 19 yearold son had a girlfriend last year. I really liked her. Then they split up. Some months later it was her birthday and I sent her a message "Happy Birthday" nothing else. She replied "thanks". Now they are thinking of getting back together and she told him that I am very weird because I sent her a message. He told me that the fact that I have no idea about boundries makes him very sad and apparently I have to wait to be invited rather then inviting myself. I really don't want to do anything with his relationships and I didn't mean to be intrusive or inviting myself anywhere, but I had no ill feelings towards the girl that's why I did it. Is it such a bad thing to do?