I asked Abu Abdullah (as) about a woman who entered into a Mut'ah (temporary marriage) and then her husband passed away. Imam (as) said: "She must observe an 'Iddah (waiting period) of four months and ten days." Then Imam (as) continued: "If her term ends while he is still alive, her waiting period is one and a half menstrual cycles, similar to what is required for a female slave." I asked: "Does she need to observe mourning (Hadd)?" Imam (as) replied: "Yes, but if she stayed with him for a day, two days, or even just an hour during the day, the waiting period becomes obligatory, but mourning (Hadd) is not required."