if the story is true, shes either nuts or there was another reason... if you like someone and are "dating" them or "going out" or whatever you wana call it.. boyfriend and girlfriend... i couldnt imagine breaking up for something so stupid as you not warning her before you cummed.... ive had many girls get mad foor me not warning them... but thats certainly not reason to break up or stop hanging out... she must have had other reasons and used that for an excuse..