Why didn't Hannah want to go to the Seder

In Chapter One, Hannah Stern is on her way from New Rochelle, New York to see her grandparents for Passover Seder in the Bronx with her mother, father, and brother Aaron. Hannah complains that she does not want to go. Her Mother reminds her that it is Passover. Hannah continues to complain that she does not want to go to her grandparents’ home. She is sure that she and Aaron will be the only children there and all the adults will only joke in Yiddish and tell them how much they've grown.