You all go to your room

Your room is hardly massive-- it's a single bedroom, after all. But one thing it has over nearly every room on the floor is privacy. No one is going to bother the four of you if you're hanging out in your bedroom.

You unlock the door and lead the others inside, Marlena right behind you. By the time you've turned around, you find Greg and Alaina making out, her hands exploring his body while he pulls her closer to himself.

You take the opportunity to do the same with Marlena, gently placing your hands on her hips and turning her body toward you. She giggles and throws her arms around your neck, grabbing you by the back of the head and pulling you in to kiss her neck. "Grab my ass," she whispers in your ear. You oblige. It's as wonderful as you hoped it would be.