She begs him to fuck her.

Part of Nat knows this is a bad idea. But the bigger part of her - the one in charge, now - is an aching, needy emptiness, a yearning to be filled, a hot, slick wanting that won't be denied.

"If you need to cum," she hears herself gasp, "you'd better fuck me."

"Wha - really?" Frank's eyes widen and, behind him, Ms. Poundwell's eyebrows shoot up. "Are you sure I - "

"Just do it," Nat growls, the feral need in her voice surprising even her. "Fuck me! C'mon, please, I - ahhhn!" Frank, practically ripping his shorts open to drop them to the floor, leaps forward and, fumbling, spears his cock into her.

Nat groans as he pushes into her cunt, the feeling of fullness exquisite. So...good... It's been far too long since she had a man inside her, she realizes, nearly delirious from the feeling as Frank grabs her hips and begins to eagerly pump in and out of her snatch. He doesn't feel quite as big as Teddy, but that's ok. He's big enough, and the energy with which he's fucking her is delicious, his pelvis slamming into her clit again and again to send waves of pleasure up through her body.

"Well," Ms. Poundwell says dryly, "It seems like you two have it from here." With a little chuckle, she goes back to her desk and pulls out some files, beginning to look through them thoughtfully while keeping an eye on the two fucking students from the far side of the room.

Natalie groans as Frank fucks her furiously. There's little art to the way he's doing this - he's just pounding her like he's trying to tenderize a slab of meat - but it's clearly doing the job for him, and the position that Nat is bound in means that her clit is getting plenty of stimulation. There's something deeply erotic, too, about the way she can't move. She keeps instinctively struggling against her bonds, body wanting to wrap her legs around him to pull him deeper or grab his shirt collar for a kiss, but the stool holds her fast. She's just splayed open for him to take, and she feels so...wanted in the way he eagerly fucks her.

"Fuck yeah," Frank gasps as he pumps into her. "Right there, yeah, right there. Good girl. Good little slut. Good little cumdump."

Natalie moans at the word "cumdump," feeling her cunt squeeze around his cock as her brain registers the derogatory name. That...that's what I am, aren't I? I'm just...a hole...a sexy, wet little hole for him to fill up with cum... The thought makes her moan out loud, and Frank leans forward, sticking his tongue aggressively into her mouth. She greets it with her own, mouths closing hungrily around each other as they both near their climax.

"Good girl," Frank gasps into her mouth. "You ready...for my...cum?"

"Please," Natalie whimpers. "Please, cum in me, fill me up, please, please..."

"Fuck yeah I will," Frank groans and, hands gripping Nat's hips hard enough to bruise, he leans back to slam into her a final three strokes. On the last one he howls in pleasure and, watching him, Nat gasps as as she feels his cock twitch against her inner walls, warm cum shooting into her. The sensation of him filling her up pushes her over the edge, and Natalie moans in pleasure, eyes rolling back in her head as her body starts to shake from her own orgasm. The wave of pleasure ricochets back and forth through her body, and she can feel herself floating away, expanding into the great emptiness of her climax.

She gathers her wits a few moments later as Frank slips his now-softening cock from her, leaving her empty and slightly aching. "Damn, I wasn't expecting all that!" the boy exclaims with a laugh, wiping his cock off on her pubic hair. "Guess I know who to ask if I need a quick fuck, huh?"

"Mmmmm," Nat bites her lip appreciatively but raises her eyebrows. "I think you've gotta count the twenty minutes Ms. Poundwell spent warming me up, if you want to know how 'quick' it was..."

"Eh, I guess. Still, doesn't seem like you'd say no to a quickie in the janitor's closet or something, huh?" He sticks a finger into her cunt, making Nat groan, and when he raises his cum-covered finger to her lips she obediently takes it into her mouth and sucks it clean.

"Maybe," she says with a little smile as she releases him. "No promises, though."

"Fair enough." Frank chuckles as he pulls his shorts back up. "Thanks anyway. Thanks, Ms. Poundwell!"

"No problem, Frank." The teacher smiles as she watches him leave, crossing the room to stand by Nat's side. As the door shuts behind Frank, Ms. Poundwell leans down to look into Nat's face. "How are you feeling, Natalie?"

"Well-fucked. So...good," Nat says with a little laugh. "Uh...can I get down now?"

"Hm." Ms. Poundwell traces a finger lightly down Natalie's throat, over her clavicle, between her breasts. Natalie shivers. "Do you want more?"

"Uh, right now? No, I...I think I'm good."

"Are you sure?" Ms. Poundwell's blue eyes are oddly intense. "You don't want me to, say, find another boy who needs his dick sucked so he can pour his cum into that needy little throat of yours?"

"Um. No?" Nat says, swallowing nervously. "I, uh. I have Spanish?"

"Hmmm. All right." Ms. Poundwell smiles suddenly, then sets about undoing the restraints keeping Nat on the stool. "Just had to make sure. You were quite intense there...wanted to be clear on whether you were going into FES or not."

"Oh. Uh. N-no! Never," Nat gasps, sitting up and rubbing her wrists to get full circulation again. Ms. Poundwell laughs.

"Never say never, Natalie. You clearly have a needy little cunt, and if you let it, it will have its way with you," she says. Natalie blushes scarlet. "The more you give into it, the harder it will be to say no to cock...and before you know it, you'll end up like her." The teacher nods at the back of the room, where the blackbanded girl who'd been gangbanged still lies on the mats. Nat's breath catches as she takes the other girl in: she's clearly exhausted, skin pink in spots from slapping under the sheen of sticky white cum that covers most of her body, and her eyes are unfocused. But even as she lies there, one hand has drifted down to her cunt and she is gently stimulating herself, fucking her own hand lazily without, apparently, even realizing what she's doing.

"I won't," Natalie whispers.

"Perhaps not," Ms. Poundwell says with a shrug. "But I give you even odds of ending up like that girl before the year's end. Less than even, if you keep that green band on. Remember the saying."

"Greens are glad to serve," Nat mutters, having heard it enough times to know it by heart. "Reds are all reserved. Blacks are whack, no need to ask."

"Exactly," Ms. Poundwell says with a nod. "If you really don't want to hit FES, I'd try to find a guy to redband you. Usually it's better to be a fucktoy for one man who cares at least a little bit than to be giving courtesy fucks to people you run into. ...Usually."

"Ok. Thanks, Ms. Poundwell," Nat mutters, pulling her clothes on.

"Of course, dear. I can't help but wonder if you're in the wrong class...I have a few spots open in Practices of Sexual Service, if you'd like to switch."

"Er, no. I'm good, thanks."

"Suit yourself." Ms. Poundwell shrugs and hands her a slip of paper. "Here's a hall pass - the bell might ring before your next class."

"Thanks," Nat mutters, taking it and hurrying out the door before Ms. Poundwell can ask her any more questions.