A Patient Whose Entire Family Mourned, but He Did Not Mourn

A woman whose father passed away and was buried on the eve of the Sukkot holiday, while her entire family mourned briefly on the eve of the holiday. She was in the delivery room and could not mourn. Does she need to sit shiva after the holiday?

She does not need to mourn after the holiday because she was unable to do so due to circumstances beyond her control.

It is written in the Shulchan Aruch, Yoreh De'ah, Siman 399, Se'if 1: "But if he erred or intentionally did not observe mourning, or if he was close to nightfall and could not observe, the festival does not cancel the mourning; and certainly, if he did not know of the death of the deceased before the festival, the festival does not cancel, but he observes in the festival things privately and counts seven after the festival." This is clarified by the Mishnah Berurah, Siman 548, Se'if Katan 53: "Nevertheless, a woman who has given birth and has a deceased relative whom she is obligated to mourn for, and similarly other sick individuals who cannot mourn due to their weakness, since they knew about it but due to forced circumstances could not observe mourning, and the festival occurred within the seven, the decree of seven is canceled for them, and similarly regarding thirty." And so it is written in Shu"t Chatam Sofer, Yoreh De'ah, Part 2, Siman 142.