How do I deal with this.? ...need to vent 😔

Karina
It's been rough throughout my WHOLE pregnancy. During the beginning of my pregnancy I lived with my boyfriend (baby's father). I didn't know what to expect day to day. Some days it was good some days it was bad. Either him or me. Our relationship was never the best but we hanged on. At around 15weeks into my pregnancy I had to move back with my parents and he had to move back with his for the meantime due to personal issues. I wasn't happy at all about the decision but it was our last resort since I refused to move in with his parents. I knew that coming back home was only going to bring problems. I love my mother and siblings but I absolutely can not stand my stepdad. He is so disrespectful with my mom and I really don't understand why she just doesn't leave him and stand up for herself. I've stood up to him before and things just end up terrible bad. And it's happened almost every single day since I came back with them. I'm 22 and now 36w5d and I can't stand being here at all. I can not stand that man and see how he mistreats everyone, especially my mother when she does everything for him. He's useless other than at work if it wasn't for my mother. And it gets me so mad my mom allows it. I'm the only one of my siblings that's not his child and I've always been the "bad" one of course because I'm not his child. But honestly I'm GLAD I'm not. He has provided for me financially other than that he's ALWAYS been a disrespectful man. Not only to us but to everyone around us. And now not only that my brother, his oldest son, is catching the same attitude and way of being as his dad. He's disrespectful with our mom and highly praises his dad and everything he does. I don't understand why if my mom does everything for him too. He's so lazy when before he wasn't. My mom does all the yard work, when him being a man should be the one helping out. He doesn't watch his mouth and manhandles our mom at times. I've tried to speak up but both of them (stepdad and brother) shut me up saying that I have no say in what happens in the house because I once left with my boyfriend and they were not okay with it. I really dont know what to do about the situation anymore or how to handle it so my emotions dont affect my baby. I don't know how much longer I can live here but at the same time I do not want to leave my mother and other siblings to their own fate... sorry it's so long just had to get that off my chest.!!