There was no protest, no rationalizations, not even real hesitation. Emma just bent over the desk, accepting her fate. She already knew she had no room to argue, that she was already too deep in to stop now. In effect, the rationalizations didn't revolve around whether she complied or not anymore, but around her own enjoyment of the situation. Those new posters cemented sex itself, actual intercourse, as part of the course. Creampies, even! Had she been horrified, seeing that? Yes. No? Horrified, excited, horny. Was it all the same?
Even now, bending over the desk, hearing the teacher do his introduction, she couldn't help but imagining what was to come. Dreading it, anticipating it. The way he talked, surely she'd get fucked again. There was no way around it. He would show them a different position this time. Taking her from behind. Coming inside her, again... She would try to clean herself, but run into that sports team again and- no! No, this time she knew to take the other door... but maybe one of the students stole her dress, the teacher locked up the room, stranding her in the masses of students in the hallways, naked, cum dripping down her...
"Ah!" Emma gasped as her fantasy was interrupted by a baring of her backside. A wave of hot arousal washed over her. They had to see it. How her wetness dripped down, already.
"Vaginal sex is all well and good..." As the teacher spoke, Emma grew a little panicked, and even the horny part of her wasn't just excited anymore, but a little scared. Did he mean...? What else could he...!
Another gasp, as she felt the cold lubricant being massaged onto her asshole. That was a spot Emma definitely hadn't explored much. Only thing she had inside her before was a small thermometer. Would he actually... penetrate her asshole? Oh shit. He said it, anal sex. No no no, he wanted to go all the way, she wasn't ready, she wasn't prepared for that-
"Mmmhh..." A throaty moan, almost a grunt, as he forced his finger inside her, with a lot of interested eyes watching. This was definitely a novel feeling. A little uncomfortable. A lot uncomfortable, actually, nothing was supposed to go in there! And yet... the pressure was enticing, somehow. Automatically, she flexed her muscles down there. To try to expel the intruder? Or to increase the feeling of fullness inside of herself?
Before Emma could really get into enjoying it, the finger was removed. Though she didn't have to wait long for something else to try to gain entrance. She squeaked in fear and delight when she felt how much bigger it was, or at least, seemed. She already hadn't expected to be able to take that finger, and in comparison, this cold metal thing felt even more impossible. She groaned and moaned as it was being worked in, astonished that the progress wasn't actually that slow.
And then, it was inside.
Standing felt weird. Everything felt weird with this constant feeling of fullness inside of her. Pressure where there shouldn't be any. It was like her most private place was constantly being exposed and invaded. It was intensely arousing.
"Uhh... I... I never had anything inside of there! It's, uh, weird, to say the least. But, somehow, it also feels... good? At first it hurt, but now I'm, uhm. Getting a little aroused..."
She didn't even manage to fall back into her confident persona. Her shyness, her embarrassment, that was her right now, and they got to see the truth of it.