mother in law

Hey guys ! I'm new here but i have something to say, and i dont know what to do. So i live with my bf and his parents we have a 4 month baby and at the moment im trying to look for a job and we want to save up to move out . My bf mom never liked but she pretends that she does ,one day she ask my bf if he didn't like other women he said no and her response was "oh so you like little girls" he said that he liked girls his age ,he's 21 .so i think she's been doing things to make him want older women his mom is 43 and she walks around with see thru dresses with no bra on and her nipples are always hard so its obvious. when she changes she leaves her room open .Even when she uses the restroom and she's always wearing tight clothing or when my bf is holding the baby she goes over and "looks at the baby" and leans forward so her boobs are in front of his face . I cant stand living here no more ,i always get mad when she does that but i can't do anything but wait until we move out .