Summer's End — Adriana Kraft

The best summer ever has to end sometime. Jen and Brett Andrews have reveled in their erotic threesome with summer housemate Sarah Creston -- but it's August, and she'll have to leave.

How do they react? For starters, they branch out to a new sizzling encounter with a Latino couple who've been flirting with them on the lifestyle site. Addition is so much better than subtraction.

Sarah wastes no time, either. Worried about Ryan after his heart attack, she arranges a private threesome with him and Donna to ease him back into the play scene, then makes her own moves to line up possible future playmates.

As a finale, Jen and Brett stage a house party to die for.