I'm moving back to Phoenix and my MIL offered for us to move in with them and his three brothers and…

I'm moving back to Phoenix and my MIL offered for us to move in with them and his three brothers and little sister, I want to for the simple fact that it will allow us to save up before the baby gets here. I'm just not sure if I will be comfortable living with people I've never lived with before. Idk what to do.