"I finish class at eight. Mom, if you're really not feeling well, I'll call you an ambulance, alright?" Nadia did not want to miss out on the lab experiment that night.

"Sigh, forget about it. Pretend I didn't call you! Next time, if anything happens to me, I won't need you and your brother to care for me. I'll just call your father instead!" Mrs. Raven said scornfully and hung up.

At half past seven in the evening, Nadia rushed home.

Mrs. Raven was munching on nuts while watching television.