On the basis of the following Hadīth, it is understood that if a wife refuses sex to her husband she will be cursed by the angels:
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا دَعَا الرَّجُلُ امْرَأَتَهُ إِلَى فِرَاشِهِ فَأَبَتْ فَبَاتَ غَضْبَانَ عَلَيْهَا لَعَنَتْهَا الْمَلَائِكَةُ حَتَّى تُصْبِحَ
Abū Hurayrah reported that the Prophet said: “When a husband calls his wife to bed, and she refuses and [as a result] the husband spends the night in anger, then angels curse the wife all night till dawn.”
In order to understand this Hadīth, the following points need to be understood:
Firstly, a husband and wife safeguard the chastity of one another by providing one another a legitimate means of satisfying the sexual urge. This protection of chastity is essential for the preservation of the family unit – the very institution on which the stability of a society hinges. Hence anything which puts chastity in jeopardy is disliked by the Almighty.
Secondly, a man is an addressee of the directive mentioned in this Hadīth on an equal basis. This is evident from the directive of īlā mentioned in the Qur’ān (2:226-7) in which the Arabs of the pre-Islamic period would swear to sever sexual relationship with their wives because of anger. Although the husbands were prescribed a period of four months to decide the fate of their wives by either resuming these relations or divorcing them, it is evident from the directive that in normal circumstances a husband is not allowed to sever sexual relations with his wife without a valid reason. So much so, if a person swears such an oath, he must break it. Such relations are the right of a wife and if a husband does not fulfil them, then he can be regarded a criminal both in the eyes of the law and before the Almighty in the Hereafter.
Thirdly, the basis of refusal by the husband or wife must also be taken into consideration. If either of them is tired, sick or simply not in the proper mood and in the appropriate frame of mind, then this does not entail any wrath of the Almighty. It is only when a spouse starts to deliberately evade such natural needs of the other that the attitude becomes questionable.