Not quite yet, touch me more

"Before they do, would you bring me to the brink of orgasm? Get me all pre-cummed up for them. "

"Ok, but don't let yourself climax yet, ok? I want them to experience that for themselves."

"Of course," you say, and then you get back to work on Sophia's breasts.

The class is completely silent as they watch you, Sophia, and Diana interact. Several of the students even have their hands in their own pants, massaging themselves as you, and Diana work on Sophia. You look up and see that Sophia is looking at the girls in the class and biting her lip. You can tell that she is both turned on by the thought of being watched by them, and nervous by it.

Sliding your hands to Sophia's nipples, you lightly brush circles over her areola with each of your thumbs, and then, with the rough skin of your forefingers, you lightly draw little circles around her nipples, ever so lightly grazing your fingertips against her erect nipples.

"Oh, God," Sophia moans, "that feels so good!"

Meanwhile, Diana is pumping you faster and faster, watching you closely to make sure you don't cum. Her hand is extremely warm, and you can feel the blood rushing into your cock with every pulse. Your heart is pounding, your face is flushed, and you're feeling more and more turned on by the second.

"Oh! Oh, Joe!" Sophia moans, her breath catching as she tries to stay quiet.

"Class, do you see what's happening?" Diana asks, continuing to pump faster.

"Yes!" The class answers together in a hushed whisper.

"He's so turned on by Sophia's beautiful body, it's making him want to cum. See how his body is responding?"

You groan, "Ahh!" as you reach your hand forward and slide the elastic of Sophia's panties down to her thighs. She gasps as you begin to tease her pussy with your fingertips, your other hand still full of her breast, squeezing and kneading.

"Oh, God," she moans, looking around at the class, "I can't believe you're touching me there!"