What is the ruling regarding a husband forcing his wife to have anal intercourse, especially during menstruation and with violence and deceit? And what is the ruling regarding his prayer when he has not performed ghusl from janabah?

Anal sex is forbidden and is a grave major sin. It is not permissible to obey one's husband in performing this reprehensible act. If the husband overpowers his wife and forces her to do so, there is no sin upon her.

Neglecting prayer or its conditions is a great evil. The wife should advise her husband and try to reform him. If he does not maintain prayer after she has made an effort, it is better for her to separate from him.