Boyfriends father tucking me in??

My boyfriends father thinks it’s okay to tuck me in.. even after i repeatedly told him no.. i woke up one morning, my boyfriend and son gone, he was tucking me in or something i was half asleep. i was in a maternity bra and shorts.. my boyfriend flipped and he said it was because my boobs were hanging out.. but they weren’t, i got up and looked at myself to make sure i wasnt showing because god that was so uncomfortable.. now he’s mad and calling me names because of it. im also 20 weeks pregnant, and get really bad hot flashes too. im so uncomfortable now, and this dude came downstairs butt naked before i wish i could bleach my eyes. he’s like 52. im only 18. idk what to do and his mom dont believe me.. my boyfriend said that his dad slapped a previous girlfriends ass before too..