in laws advice

I'm having MIL and SIL problems, sadly we live with them bc we can't find a place yet .. we got along fine at first, it's me my boyfriend our baby , my SIL her husband and their kid, MIL FIL and my bfs two brothers living here. All of them work and the brothers go to school so it made sense that since I didn't work I'd do the cleaning and cooking. After awhile I got tired of it because they didn't give ANY money to buy groceries and a lot of days they wouldn't eat what I'd make. It also pissed me off that they wouldn't even try cleaning up their messes anymore bc they knew I stayed home and knew I always cleaned. One day my parents came over and told me the mess they leave daily is ridiculous and told me I need to stop letting them treat me like I'm their maid. So that's when everything started, since I obviously was of no use to them no more they felt the need to talk shit .. my bfs brothers wife told me a lot of things that his mother has said ( about certain things that she wouldn't know about unless someone told her so I believe her) and I was upset , told my boyfriend, it became an argument and he basically said what do I want him to do bc it was his mommy. That was before I was pregnant and since then there have been ALOT of those fights. Basically, I don't like them and if they were anyone else I would have opened my big ass mouth already .. but since it's his family it's hard. Tonight something else happened  and I was like so you're just going to let them talk shit about me and he goes WHAT AM I SUPPOSED TO DO ITS MY MOM. so I was like so it's ok for her to talk shit about me bc it's your mom?! I don't want him to curse her out or get pissed at her, I just want him to give me my place and at least ask her to stop. He doesn't know how hard it is wanting to leave but staying because I love him but I just can't with these people anymore. I've never met such ugly two faced people in my life.

Advice? Anything ?