This happened many moons ago.
Ex-boyfriend asked my cousin out, she entertained it. My mum said it wasn't anything to do with me because we weren't together any longer.
WIBU to think this was just not right?
For context, cousin and I lived on the same road. Fairly close growing up as children.
She has form for sleeping with her friends' boyfriends and doesn't care much about the consequences.
My mum hasn't really ever been much of a mother figure, this is just another example where she discounted my feelings entirely.
WIBU?