Crazy ass family life

Demy

So, I have a 7 month old and am currently pregnant with my second. We moved in with my father, who I've never lived with before. My dad is the easiest person here to live with. When we moved in, it was my parents, us, and one other couple and the three dogs. It was fine. My little sister moved in and stays on the landing because she lost her apartment (she has no debts and gets money every month from a suit on top of having a job.) So she lives on our landing. She decided to start trying to change and control everything and my parents just let her. Then, they let a former junkie friend of my sisters come and live on the couch. I wouldn't have any problem with these two if they werent so argumentative all the god damn time. My sister takes crazy advantage of my parents and every one of these people glorify the violent lifestyle that they all used to live. I love my parents and I don't want to take their grandkids away but I don't want to raise my kids around a constant need for physical confrontation. Not mention that I can hear gunshots out my window almost every night. Me and my fiance have already decided to move back to Oregon as soon as we can get a car but how do I tell my dad that I'm leaving because this place is just too much? What would you do?