Does a wife sin by sometimes getting angry with her husband, who is excessive in oversleeping the Fajr prayer due as a result of continuous late nights in front of the television and internet?

Advising her husband regarding Fajr prayer is a good deed from the wife, and she should continue doing so gently and kindly, supplicating for his righteousness, while benefiting from fatwas related to maintaining Fajr prayer. The husband's negligence in obeying Allah does not negate the obligation to obey him in what is good and permissible. Thus, the wife is obligated to obey her husband even if he is negligent in obeying Allah.