I've been with my boyfriend for only a week and his daughter whose 18 seems to always try to be in competition with me in some way shape or form. She walks around in a bra and underwear in front of her dad, gets undressed in front of him, dances inappropriately in front of him, hangs all over him, listens to inappropriate songs around him and is constantly doing rude things for his attention. It was annoying at first but now it's beginning to spark some questions. He allows her to get away with things the other kids can't, she gets her way after cussing, hitting and cussing at me...he treats her like his girlfriend and she acts like it. She acts exactly like an angry ex girlfriend and No I'm not at all exaderating. Can someone give me input or helpful ideas to what the heck is really going on...Oh Yeah one more thing...we were going to have sex and he had a full erection, the 18 year old was up and in the living room which is next to the kitchen, he gets up fully erected in his underwear and says he needs to move the trash can so the dogs do not tip it over. I hear him and her conversing back and forth, he comes back and I confront him and he immediately yells at me.