Sam does the dare, and she takes Steve's advice

"Alright! Alright, already!" Sam said as everyone was looking at her. "Liz, could you please put on some music?"

Sam stood up and grabbed a chair and put it in the middle of the room. She went over to Jon, took his hand, and led him over to the chair. She pushed him towards it, and he sat down. Just as Liz started a nice classic rock song, Sam started dancing. She had her back to Jon, wiggling her ass enticingly towards him.

"Work it, girl!" Kay shouted her encouragement.

Sam took off her shirt, revealing a nice pair of C cup boobs behind a white lacy bra. They were the perfect size for her petite frame. She continued to dance in front of Jon as she wiggled out of her pants, revealing matching white lacy panties. Jon was clearly appreciating the sexy scantily clad redhead dancing in front of him. You were appreciating her too. Seeing her dance like this just reminded you how hot Sam was, and her body, which you've never seen so much of before, looked really good.

At the same time, though, you were angry at Steve for giving her this dare. It was clear to you that she didn't want to do it, and that he was escalating the game way too quickly. You were also jealous because stuff like this never happened to you as a guy. Jon just showed up here like 5 minutes ago and he's already got a hot sexy girl dancing for him in her underwear. I guess that's what being a popular football player will do for you.

Sam was sitting entirely on Jon's lap now, facing him, dancing and smiling at him sexily. Jon's hands roamed her body. It was almost comical the size difference between the two, now that they were so close together. Jon was well over 6 feet tall, a football player, and Sam was maaaybe 5 foot on a good day, 95 pounds wet and with boots on. You had to admit she was putting on a good show even from your vantage point, with Jon mostly enveloping her.

A tent had formed in Jon's pants, his hard-on pressing against Sam's pantie-clad pussy and ass. Sam of course took every opportunity in her dance to grind against it. She was clearly trying to get him off. You hoped he would cum soon.

Suddenly one of Jon's hands reached up and grabbed Sam's bra strap. He unhooked it!

"Jon!" Sam exclaimed, "you naughty boy!"

Sam paused her dance and pressed her now unhooked and loose bra against her chest. She gave Jon a sultry look. "You wanna see my tits?" she asked. Jon simply nodded and smiled. Sam started dancing again. "Okay," she said finally, taking off her bra completely, exposing her perfect pale breasts, both nipples standing at attention.

Now topless, Sam continued her sexy lap dance. Jon's hands alternated between stroking her back and grabbing her ass or her legs. He was starting to thrust his hard-on into her crotch, when suddenly he pulled her towards him and started sucking on one of her nipples.

"Ohhhh," Sam moaned as he did this. His other hand reached up and grabbed her other boob. "Uh. Uh huh!" She threw her head back in pleasure, her long wavy red hair flowing down her back. She continued to gyrate her hips, grinding her pussy against Jon's still fully-clothed cock.

Now this dance was starting to bother you in more ways than one. You felt as though your boobs were swelling, as your nipples tinged with jealousy and anticipation watching what was happening to Sam, and there was a strong but pleasurable tingling coming from your groin, as you imagined that you still had your cock and that Sam was dancing on it rather than on Jon's.