What should I do about my father's repeated betrayal of my mother, especially since he is diligent in prayer and offers religious advice? Is this considered hypocrisy, particularly as I have been observing him closely and found evidence of his betrayals, and I fear confronting him so as not to devastate my mother, given that attempts by relatives to reform him have failed?

What the father is doing is a betrayal of his religion and his wife, which destroys the family. The following is advised:

1. Stop spying on his messages, as this is forbidden and has a negative impact. 2. Search for the reasons behind his falling into the forbidden, as the wife might be the cause. She should then be advised to improve the relationship and treatment. 3. Offer indirect advice by asking for his consultation on a problem similar to his own. 4. Confront him frankly and directly, with kindness and love. 5. Seek the help of men close to him to advise him and remind him of the consequences of his actions. 6. Supplicate for his guidance and righteousness, especially during virtuous times. 7. If he persists in his actions, the wife may seek separation from him through divorce or khul'. As for the children, they should continue to honor him.