I'm 16 and this exact same thing happened to me a couple weeks ago. Playin' black ops, and sonofabitch, she was talking about how violent the game is for like...20 minutes.
She actually said: Why don't you play a game where you shoot all the cats and dogs? And get extra points for killing horse? Would you like that game?
I think I posted about this before, but bottom line, OP I feel your pain so much.