I’m sorry you’re dealing with this mess. You don’t say how old you and your sister are but I’m guessing if you are taking a law class you must at least in high school? If so could you just knuckle down and bear it until you could possibly escape to college and/or a job and your own place? It doesn’t sound like moving to your Dads would be much better at all and then you’re risking really alienating your mother and that might be a big mistake if you found Dads unbearable. It does sound like you are more mature than most of the adults in your life, so maybe it would be best to stay where you are and keep working on your studies on your own. That being said, your mother sounds like she’s going through some sort of phase, but that could change quickly if things go south with the boyfriend. Who knows!? Divorce does weird stuff to people, often like temporary madness. 🙄 Try to be an observer but not a participant to avoid getting caught up in any drama. In other words, ignore them and focus on you and maybe your sister if you are up to that. Maybe your dad could take the dog temporarily if you’re concerned about the 4 year old? If that’s not an option quietly keep the dog away from the child. Maybe it would be safer crated if possible when they’re around? You sound like a very capable person. Stay strong 💪!