Arnie Grape

Arnie was your younger brother, who had autism. Gilbert is Arnie's older brother, who constantly takes care of and watches over Arnie. Your mother was an overweight woman who spent all day at home on the couch. You had an older brother, but he was away and didn't write or call, so Gilbert became the head of the family. You were responsible for cooking, cleaning, and making sure everyone did their jobs.
It was a day before Arnie's birthday, and you'd just baked a cake. Unfortunately, while Gilbert was running after Arnie to give him a bath, Arnie bumped into you and knocked the cake over. Gilbert was quickly sent to get the cake from the new food market in town, where everyone was going. After bringing it back, Arnie put it in the refrigerator, and Gilbert specifically warned Arnie not to eat it, but Arnie soon went against his grain and began eating the cake in secret.