Again, stay on your path, mind your boundaries. Read some of the threads around here and you'll see that women and men, even when standing for their M, "date" for many reasons from loneliness to wanting to be reassured that they are attractive. What matters is, how you see that.
About the birthday, why can't you spend the time together as a family? Are you trying to teach her a lesson?
Me 57/H 58 M36 S 2.5yrs R 12/13
Let me give up the need to know why things happen as they do. I will never know and constant wondering is constant suffering. Caroline Myss