Is it permissible for a wife to supplicate against her husband for death and accidents, and will her supplication be answered, even though he tries to make her happy and she withholds herself from him?

The supplication of the oppressed is answered. If you have wronged her, then apologize to her and ask for forgiveness. If her supplication is without right, it will not harm you. A wife's refusal of her husband without a valid excuse is a grave sin, and it is impermissible to look at women other than one's wife, for it is a sin and could be an injustice to her, which raises the fear of her supplication being answered.