Is the prayer and fasting of one who has insulted the Lord while fasting accepted, and is immediate repentance obligatory for their acceptance? What is the wife's situation in this case, and what would deter the husband from repeating such an act?

Scholars unanimously agree that whoever insults Allah, whether in jest, seriously, or mockingly, is an infidel, based on the Almighty's saying: (And if you ask them, they will surely say, "We were only conversing and playing." Say, "Is it with Allah, His verses, and His Messenger that you were mocking?" Make no excuse; you have disbelieved after your belief..). His repentance is accepted by the majority, and some scholars hold that it is not accepted if the insult is repeated three times, but the view that it is accepted even if repeated is more evident. If an apostate repents or pronounces the two testimonies, his repentance is definitively accepted. The questioner should know that if the man repents, or pronounces the two testimonies, or prays before her waiting period ends, the marriage continues. She should explain to him the seriousness of the matter and clarify that she is unwilling to stay with him if he repeats such behavior.