What can we do/say to him?

This guy is just plan old immature, he's 44,and he's been in prison for robbing Kmart b/c my Mil wanted a divorce from him. Well to make this clear he is not my husbands real father he just signed the paternity papers,his real dad is also in prison but he don't get out 'till 2020. Well after Larry(mil's first husband) got out of prison he got married to some woman named deb and i guess she wasn't doing everyting he wanted so he contacted sherry(my mil) and she talked to him and he came over to visit to see his real son, my husband isn't his kid so. Well less than a month later he come's to the house wanting to talk to all of us and he ended up leaving deb and moved in here with sherry,my husband,his brother,and i, and i'm also expecting our first child. But in 5 or 6 months my husband and i will have our own house. Right now we are paying them rent and grocery's. But the point is he's been here for about not even 2 months and he acts like he own's the place and no one can joke with him without him getting mad,he's bossy now,and yesterday he yelled at everyone yes even me, when all i did was clean the house b/c i was bored and was tired of it being dirty. Tell me aint that stupid or what? Then he yells at sherry b/c sherry asked him a simple question and he just flipped out. He flipped out on my husband's brother to the point where he went to his Gf's house to stay 3 night's with her, and i can't go anywhere b/c i'm on bedrest b/c i'm having contractions very early i'm only 6 month's pregnant. I was fine untill he became a jerk, i had to quite my job b/c the doc told me to but ever since i let my job go i've been doing everything around here,and everyone but him has a problem with it. I get yelled at from him if i do nothing and if i do something i get yelled at from my husband,my mil,my brother in law,and my doc. So i'm like what am i suppost to do. My mil put her foot down last night and she told him like it is but you know what he said " if you want me to go i'll leave" and sherry replyed saying " i don't want you to leave but i do want the bullshit to stop" but there were fighting all last night but my husband and i fell asleep at 9pm so i don't know what all was said and done but everything is just getting on our nerves, hell we can't even get breakfast in the morning without him being nosey and rude, it's not like he's buying them or cleaning around here. He don't rule this house, sherry does and what she say's goes, but he aint falling for that and he's getting more of an atitude with everyone, so that's why i'm on here to ask for some advice, so if anyone has advice or comments please do so. BTW: i asked my husband this morning if larry was abusive in the past and he told yes, he threw sherry accross the kitchen and hit her on the stove,and he was also verbally abusive,but i told my husband if he even threaten's to hit me or her or anyone in that matter i am calling the cops on his ***. I lived with people like that before and i am not putting up with it again. So we have to live with this bullshit for anoher 5 or 6 months but hopefully sooner we can get out of here, or he'll leave either one of the two. Advice?