Third Divorce – Seeking Advice

Assalamu alaikum. I need some guidance regarding my parents. Their marriage has been really difficult, always full of tension. My father has used the threat of divorce (talaq) many times to control my mother, like “If you don’t do this, you’re talaq.” Yesterday, he said talaq for the third time. We’re all in Canada, they still live under one roof, and there are four of us kids. My father has been verbally harsh for years, and when he says talaq, he’s usually very angry, not thinking straight. Now he says he wants everything to stay the same but doesn’t want to see my mother – they sleep in separate rooms. He expects her to stay in the house but wear hijab whenever he’s around. I suggested talking to a knowledgeable sheikh. Maybe with the full history and the state he was in when he pronounced talaq, some of those might not count? My mother really regrets not trying to fix things earlier and feels it just spiraled to this third talaq. She still hopes there might be a way to reconcile if it’s possible Islamically. My mother doesn’t work, has no family to turn to, and nowhere to go. She’s completely alone in this, which makes it so much harder. Any advice would be appreciated. Jazakum Allahu khayran.