Describe the phone call between Mom and Grandma in My Feelings.

Oskar's mom calls Grandma as soon as the second plane hits the second tower. She is worried about her husband, who is not safe at the store but at a meeting in the World Trade Center. Mom wants Grandma to watch Oskar, not let him see the news, and tell Oskar everything is OK. For the first time in the fifteen years, Mom tells Grandma "I love you."