Are the prayers and charities of one who has anally penetrated his wife for four years accepted?

Anal intercourse with one's wife is forbidden by Islamic law. There is no evidence to suggest that the prayer or charitable deeds of one who commits this act would not be accepted. If one repents, Allah accepts repentance from His servants, as He states: "And it is He who accepts repentance from His servants and pardons sins." Furthermore, Allah transforms the evil deeds from which a servant has repented into good deeds, as He states: "Except for those who repent, believe and do righteous deeds - for them Allah will change their evil deeds into good ones. And ever is Allah Forgiving and Merciful."