Is the mother considered irrevocably divorced after the father uttered "Your mother is divorced" three times in front of his daughter and her uncle, along with his immediate regret for it?

Your sister, who used abusive language towards her father, has fallen into disobedience ( 'uquq ), bad manners, and lack of religious commitment, and this is impermissible. Disobeying one's parents is among the gravest of sins. Your second sister, who ordered her father to divorce her mother, has also disobeyed her father and committed a great sin. You must advise your sisters to be dutiful to their father and warn them about the gravity of disobeying him, and that disagreements between parents do not nullify the father's right to dutifulness. As for your father's divorce, if he was aware of what he was saying and repeated the divorce three times, then his wife becomes unlawful to him until she marries another husband. However, if he was unaware of what he was saying due to intense anger, then nothing is incumbent upon him.