Q 1: A woman says that her husband does not perform Salah (Prayer) (Part No. 18; Page No. 283) and rarely performs Friday Prayer, and that he drinks alcohol and takes drugs. When she performs Salah he makes fun of her.
Is it permissible for her to remain his wife?
If the reality of the husband is as mentioned, it is not permissible for his Muslim wife who observes Salah to stay with him; because the husband, by abandoning Salah and making fun of her when she performs Salah, has become a Kafir (disbeliever/non-Muslim). Allah (Exalted be He) says,
...then if you ascertain that they are true believers, send them not back to the disbelievers. They are not lawful (wives) for the disbelievers nor are the disbelievers lawful (husbands) for them.
She has to be separated from him through the legal means that she can follow. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.