Sophie touches herself.

"I'm not totally aroused," Sophie responds, "but I don't think I feel comfortable taking my underwear off in front of the class."

"That's ok," Diana says, "you don't have to move forward."

"No! I want to. Um," Her hand drifts down between her legs, "Is it ok if I touch myself to get aroused? Like you're doing to Joe?"

"That's a great idea, Sophie," Diana starts pumping you slowly. It feels amazing. You put a hand over her hand, just to feel her softness as she strokes you.

Sophie watches Diana's hand on your cock as she starts to slowly touch herself over her white panties. She begins breathing faster as her hand explores, finding her pleasure. She continues watching, focusing, legs swinging wider and wider open as she relaxes into her own ecstasy, fingers making circles across her clit. You want to rip her panties off, but instead you push into Diana's hand as she pumps you faster and faster. You thought she was just keeping you fresh, but something seems to be exciting her, and she's definitely pumping to match your increasing arousal.

Sophia starts going faster herself- her lips part- and then she manages to say "I'm- I think I'm turned on enough now!"