A mourner at his child's wedding

Hi,

One who lost a parent may attend his son or daughter's wedding during the shivah, since missing the wedding would constitute a major loss.

However, during the meal the mourner should not sit in the place of honour usually reserved for parents of the wedded couple; perhaps they should not even have a specific seat.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 4:40:16)

Have a good day,
Mordechai