Muhammad ibn Ismail ibn Bazi asked Imam Ali ibn Musa Ar-Ridha عليه السلام about a woman who permitted her husband to have relations with her bondwoman. Imam عليه السلام said: "That is permissible for him." He then asked: "What if he fears that she might be joking?" Imam عليه السلام said: "If he knows that she is joking, then it is not permissible."