Diana tries to be efficient

You close the classroom door firmly behind you, and find the class much as it was before. It looks as if Diana had left the girls with some kind of reading assignment while she was gone, as the girls have some papers and books out in front of them. Upon seeing you, however, they quickly set those books aside.

Diana is standing in her usual spot in front of the class, but whereas she looked confident and collected just twenty minutes ago as she taught the class how to suck your cock, now she clearly looks nervous. Whether it's because she's about to have sex with you or because she's about to be exposed in front of her students is anyone's guess.

True to form though, she doesn't let her nervousness get in the way of teaching. She still stands straight, head raised high, and as she turns to address the class your heart skips a bit. There's something about the gentle line of her long, dark hair sweeping against her neck and how it leads the eyes down to the curve of her breasts- you've always noticed it, and it's always been, well, pretty intoxicating.

"Ok, everyone," she says, "Slight change of plans. Class is getting closer to ending, so Joe and I are going to demonstrate intercourse, rather than having one of you demo with him as we'd discussed before."

More than a few of the girls look a little disappointed, in particular you notice Samantha, the slim girl with the long black hair, let out a theatrical sigh. Your eyes go to Sophie, who is now fully dressed again, much to your dismay. She looks at you with an inscrutable expression. You feel somehow confident that if you walked up to her right now and offered your hand, she'd take it and follow you wherever you led.

"So..." Diana hesitates, then mutters to herself, "How are we going to do this? It just doesn't seem professional..." Then she brightens up. "Class, ordinarily I would hesitate to undress in front of you. But we've been talking about body positivity for the past year, discussing how women can feel ashamed of their bodies and how that just isn't necessary. So, I'm going to take off my pants in front of you and demonstrate intercourse. No shame!"

Blushing bright red, Diana decisively unzips her dark slacks, and drops them to the floor. Her legs are exquisite, long and toned, with smooth, perfect skin. She's wearing narrow, black panties. Your dick begins to harden noticeably, and your heart picks up in anticipation of what's to come.

Meanwhile, though she dropped her pants decisively, Diana freezes up again, turning even brighter red.

"Ah, I just realized something," she says, have to you and half to the class, "This is all so sudden, I'm not turned on at all!" She laughs nervously. "I kind of need to be aroused in order for this to feel good, and that's half the point isn't it? So...well, Joe, we had you get yourself hard in the beginning of class, but now I guess we need to figure out how to get me...lubricated."

Seeing your friend half undressed, nervous but also laughing as she talks about getting herself wet...you're having no trouble getting hard. If it was just you, you'd slide her panties right off and go for it. But it's not just you, so....

"So, what are you going to do?" You ask.

Diana laughs and sighs at the same time. "Well, we have a few options. I could, touch myself until I get wet. One of you girls could take one of the vibrators we played with last week and try it on me. Or...I'd also find it pretty hot if Joe sucked on one of your nipples while masturbating. But only if everyone is comfortable with that- I know Joe said he felt a little weird doing sexual stuff with you."