The eminent Muslim scholar and renowned Da`iyah, Sheikh `Abdel Khaliq Hasan Ash-Shareef, states: “It is not permissible, as far as Islamic Shari`ah is concerned, to have sex with one’s two wives together. This will cause uncovering the private parts of each one of the two wives before the other the thing which is impermissible in Islam.
Furthermore, having sex with two wives together will violate the ethics of modesty and inculcate jealousy among wives.