So im dating a guy he is 38 and i am 20. (Dont care if i get shit for it) but he has a "step daught" from his last relationship she is my age turning 21 in september. She has a baby that os turning 5 months. Well she moves in and out so many time. Took a car from my boyfriend. Moved back in after she had the baby. She moved out last time because i moved in and her family talked shit about me. Now she is pissed off i wont baby sit and my boyfriend called her out on how she sexualizes her self and everything else on social media. So she told him that i was plotting against her. She doesnt do anything in the house just sits around and my boyfriend is pissed that im getting angry about it. I told him he need to put rules on her or let her go because she really isnt his im confused what do you guys take from the situation?