Completing the set with Nicole.

"Nicole! There seems to be an empty lap. Why don't you take care of that for us."
"You want me to sit on John's lap... like this?"
"Hey, girlie, both of us are in the same boat." Sarah teases. "You get the easy one. John's such a gentle boy that I'm sure it won't be a problem."
You feel you cock jump as you remember undressing Nicole in the bedroom. She's hot, there's not getting around it. Nicole stands up, pulling at the hem of Tom's shirt a little. "I guess so..." as she saunters over to you, you can't help but imagine you see a little look of excitement on her face.
"Don't worry, Nicole." You reassure her. "I'll be nice."
"Oh? Yeah... I know..." she seems almost disappointed. "Here I come." She plops down on your lap, dropping her pussy directly into your bulge. You groan, and Nicole twists around to look at you in surprise. "Oh...is that...ohh...." her face turns bright pink, and she throws an arm around the back of your head. "I didn't hurt you, did I?"
You have no words, only the pounding of blood in your ears as it rushes to fill your already engorged cock. This is sexier than you expected: her body is hot and soft against your bare chest, and your hands involuntarily move to place themselves one against her back and the other resting on her raised knee. The shirt has bunched up in the front, exposing the hollow of her crotch. Her legs are crossed but you can still see her neatly trimmed bush and the inviting darkness beneath.
"Damn... now there's no one to grab the hat." Nicole complains, before leaning forward from your lap to grab at it. You grab at her waist to keep her from tumbling off, and the shifting movements grind her pussy against your crotch in a way that makes your groan with contained pleasure. "Got it!" she announces.
Around the room, each other couple seems to be enjoying the situation they are in. Matt has his hands around Miranda's waist, and seems to be whispering in her ear. She's grinning, and forgetting to keep her legs crossed. Sarah has spun around to straddle Tom, and appears to be pressing her tits into his face.
"Alright, let's see who's next..." Nicole mumbles.