Siri Dahl is grading papers when a woman, Lauren Phillips, enters the classroom. It's revealed that Siri is the teacher of Lauren's stepson, Elias Cash, but that she's there to see Siri. Lauren then boldly starts making out and fooling around with Siri, revealing that they are having a secret affair.
A few moments later, unbeknownst to Lauren and Siri, Elias happens to arrive at the classroom looking to speak with Siri about the school yearbook. He's shocked when he sees Lauren and Siri getting frisky with each other. Even though Elias is appalled, he can't help but spy on them for a bit, but then he accidentally makes his presence known when he drops his bag.
Lauren and Siri are startled. Lauren drags Elias into the classroom and confronts him about spying, while Elias confronts HER about cheating. Lauren and Siri try to butter Elias up and convince him NOT to tell Lauren's husband that she's cheating, but Elias holds firm. Lauren and Siri then cheekily play up how Elias was spying on them, which means he liked what he saw. Elias tries to deny this, but is flustered. Seeing that they're getting somewhere, Lauren and Siri playfully offer to let Elias join them for a threesome if he'll keep their affair a secret. Elias is shocked at first but tempted, soon giving in!