Should my niece go back when menstruation is dead?

My aunt is dead and my niece should go back. My aunt is my uncle's wife, my uncle and mother are brother and sister, my aunt died and my niece should go. As the old saying goes, my mother is older than my uncle, and my uncle and aunt are their closest relatives, so they should go as nieces. No matter how busy we are, we must take part in such activities. Although the fast-paced life has diluted a lot of things, we can't let it wash away family ties.