Brother and stepsister had incest when their parents were away

Molly Little and Jay Myers are the new stepsisters, but Jay is only suspicious of Molly. He claims that Molly is shady and he wishes he could put some truth serum in her drink so she would have to answer his questions honestly. Molly wants to know what questions Jay can ask her, and they immediately get sexual about how many guys she's had sex with. Molly plays that role, claiming that she may have had sex with multiple guys at once. She left Jay there to think about it.