Still sitting in this really weird position, I massaged my little clit with the bullet and felt myself getting hornier, nipples erect through my bra a...d my slit getting wetter, but slowly. I kept working her until that familiar wave of bliss hit me less than five minutes later, and I found myself whimpering to keep the noise down in case someone in the men's bathroom heard me...although in retrospect, even if they did hear me, I probably wouldn't care. In fact, I think they'd probably want to. They would tie her too loosely and allow her to escape, or worse still, get so horny themselves and forget about her need to teased and denied, or at least delayed, an orgasm. She loved being horny and frustrated by not being able to satisfy her desire. She had learnt the pleasure of arousal, and while it always pushed her to want more, she didn't want the release (well, not too soon anyway). She knew that once she had her orgasm(s) it would be over and she wanted the fever pitch desire to last. Therefore the other two couldn't fuck safely. Because of this Mary and I hesitated before going the whole way, but after about fifteen minutes, when she was kneeling down sucking my prick, I tapped her backside to indicate I wanted her to sit on my face. I desperately wanted to lick her cunt again. She misunderstood, and slowly, unforgettably, lowered herself onto my prick.We fucked urgently. I couldn't get enough of the sight of her cunt lips separating to engulf me, then the way they splayed. With my skirt out of the way he began sliding his pen under me, forcing it in between the cheeks of my butt and then sliding it in and out.I sat there, totally humiliated, and tried to focus on Mr. Curry. I saw him glance over and it was obvious he's well aware of what Nick is doing to me. He smiled and ignored it.The teacher's reaction would have been bad enough. But apparently Nick saw Mr. Curry's amused smile. When he realized our teacher has no objections and that he has no intention of.