The summary is:
1) Belle, Marie, and Francis have dinner at the narrator's house after school since their parents will be at the hospital late.
2) While doing homework, the narrator listens in on a conversation between their parents about Belle's mother and the word "cancer".
3) At dinner, Marie is sad that her pet bird died that morning. They then hear strange shrieking outside which the mother discovers is a strange cat. She then gets a call from the hospital about Belle's mother.