You have

You shuffle forward slightly on your knees and press your cock against Alexis's leg. The feel of her warm, firm thigh on your cock is unbelievable.

"Oh my GOD!" You hear a girl laughing in the crowd. "He's actually going to DO it!"

Slowly you begin rubbing yourself against Alexis's leg, trying to ignore the taunts and laughter from the crowd. Her thigh is firm, and you press your cock against her hard, grinding against her.

"Look at me," she says. Her eyes are twinkling mischievously. "Good doggy! Hump that leg. Hump it like a horny little dog."

You moan slightly. To your shame, a drip of pre-cum spits from your cock, and you feel momentum building in you.

Alexis rests one hand on your head. "Don't you dare cum on my leg, doggy." she says. "Cum in your hand when you're ready."

You're nearly ready to blow your load, rubbing furiously against her leg to the delight of the crowd.