Natasha's family are due to be deported to Jamaica because they're undocumented immigrants. For years, they've been living in the United States without any trouble. But one day, Natasha's father is detained by the police after driving under the influence, and it then comes to light that he and his family are in the country illegally.
Natasha's family have reluctantly accepted the fact that they will soon have to leave the United States. That includes Peter, Natasha's nine-year-old brother. He asks his sister why she's turning in homework given that she won't be in the country much longer. It would appear that Peter's just discovered the power of sarcasm, a power he uses at every available opportunity. In this particular case, it could well be that Peter's using a kind of gallows humor to make a potentially traumatic situation a tad less unpleasant.
In any case, Natasha's more focused on trying to get her folks out of the current jam they're in. She's going to head off to the United States Citizenship and Immigration Services (USCIS) building in downtown Manhattan to see if anyone can help them. Natasha's pretty desperate; if she can't find someone to help her family, then they will be deported that very night.