What is the ruling on a wife cursing her husband and his father for the most trivial reasons and without reason, knowing that she performs the obligatory prayers and fasts, even the supererogatory ones?

The Prophet, peace and blessings be upon him, warned against cursing and insulting a Muslim, saying: "Do not curse one another with the curse of Allah, nor with His wrath, nor with Hellfire," and "Cursing a believer is like killing him," and "Insulting a Muslim is wickedness, and fighting him is disbelief." What the wife is doing by insulting her husband and his father is a great evil and a major sin. She must repent and adorn herself with the virtuous manners of a Muslim. For a Muslim is not one who slanders, nor curses, nor is obscene, nor vulgar.