Fatwa by Muft E Desai:
The laws of Satar (exposing of private parts) are relaxed between a man and his wives however, such laws are not relaxed between the co-wives. Hence, it is not permissible to have intercourse with more than one wife at the same time, due to the satar being exposed between the co-wives. Furthermore, the husband cannot argue this as one of his right’s nor do the wives’ need to obey him on this aspect.
(Raddul Muhtaar, Vol.6, Pg.371, HM Saeed)
(Bahishti Zewar, Pg.347, Zam Zam)
(Ftaawa Mahmudiyyah, Vol.19, Pg.239, Faruqiyah)
(Al Hindiyyah, Vol.5, Pg.327, Rasheediyah)
Mufti A Kutty:
As regards the question you posed, it is to be noted that having sex with one;s wife in front of any other person, even if a second wife, is not permissible. Having sex with ones two wives together is prohibited even if they are willing to do it, as this involves allowing them to see the private parts of each other, which is not allowed in Islam. This also goes against the Islamic teachings that require that bedroom secrets should be confined to the husband and wife only. Moreover, this violates the basic norms of modesty
Elaborating on this, Sheikh Faysal Mawlawi, states:
It is not permissible to have sex with one two wives together for two reasons:
First, it is not permissible for a woman to look at the `awrah of another. The `awrah of a woman with respect to other women is what is between the navel and the knee. The Prophet (peace and blessings be upon him) said, hellip; and a woman should not see the private parts (`awrah) of another woman (Reported by Muslim and At-Tirmidhi)
Second, the Prophet (peace and blessings be upon him) prohibited the man and the woman to talk to others about details that happen in their bedrooms. The Prophet (peace and blessings be upon him) said:Do not do this. Do you know the similitude of those who do that? They are like a male and female devil who meet each other in the road and satisfy their desire with the people gazing at them
This indicates that with greater reason a man must not have intercourse with one of his wives in the presence of another, as the Prophet (peace and blessings be upon him) did not make exception for the second wife in this Hadith. The Prophet (peace and blessings be upon him) was very keen not to have intercourse (with any of his wives) while anybody could see or hear them.
In his book Al-Mughni, Ibn Qudamah stated that if the two wives agreed that the husband have sex with one of them while the other can see them, this is not allowed, as this is mere degradation and absurdity that violate the rules of modesty and go against sound taste
Among the secrets, which must be guarded, is the intimate relationship with the spouse. Discussing the secrets of such relationship in public or speaking about it to friends is not permitted. The Prophet (peace and blessings be upon him) is reported to have said:Among those who will occupy the worst position in the Sight of Allah on the Day of Resurrection is the man who has intercourse with his wife and then spreads her secret. (Reported by Ahmad, Abu Dawud, and Al-Bazzar)
Abu Hurayrah (may Allah be pleased with him) is quoted to have said: Allahs Messenger (peace and blessings be upon him) led us in prayer, and when he had finished he turned toward us and said:;Remain seated. Is there among you one who comes to his wife, closes the door, and draws the curtain, and then goes out and speaks about it, saying, I did this and I did that with my wife? The men remained silent. Then he turned toward the women and asked,Is there among you one who tells about such things? A girl raised herself on her knees so that the Messenger of Allah could see her and listen to what she said. She said,Yes, by Allah, the men talk about it and the women do, too, Then the Prophet (peace and blessings be upon him) said, ;Do you know the similitude of those who do that? They are like a male and female devils who meet each other in the road and satisfy their desire with the people gazing at them.