How can one deal with a husband who speaks ill of his wife to his ex-girlfriend, shares details of their marital and intimate life with her, denies it when confronted, refuses to apologize, and continues to insult and ignore his wife?

Spying on a husband’s phone is forbidden. If it is true that he is speaking with a foreign woman and speaking ill of you, then he is in grave danger. A wife is not obligated to serve her husband’s family, and if she does so, it is a kindness for which she deserves gratitude. One should be patient with the husband, advise him gently, and pray for his rectification. If his situation does not improve, the wife has the right to seek a divorce if she is harmed, bearing in mind that forgiveness is better. He has the right to travel, but he should not be absent for more than six months unless you consent. Efforts should be made to reconcile the wife and her husband's family, and what the husband has done does not justify refusing him if he calls her to bed.