She's Half Your Age!.

Laney Grey is in her room. She seems to be waiting expectantly for something when her step-mom, Serene Siren, calls “Honey, I'm home!” Laney quickly hops into bed, pulling the covers up to her chin. It's clear that she’s faking being sick. Serene wears a stethoscope around her neck. Laney says she's not feeling well and asks Serene to examine her, which seems to be part of Laney's hot plan.