My stepdad is a broke pervert what should i do?

ok my mom married this dude and he like is a lazy bum ...a while back he had to get surgery and he had to quit his job ..and now he doesnt work..but he had to lose 100 pounds before he could work..he never lost the weight now he's even bigger...so now he get disability my mom is sick so she cant work..like shouldnt the man of the house step up...NO! whenever we get money i never have money to spend on me ..every penny goes towards bills and we have to take out loans ..like wtf ..get your lazy broke *** up and get a job.. ok he's a pervert because sometimes i catch him looking at me ..like dude you are so not my type ..what should i do? and by the way im 15