Without a bra, the boys were staring at my nipples, almost plainly on display. My sheer panties left my pussy barely visible through the dress, causin... the boys to stare intently.I leaned against the front of my desk. With my skirt rested gently on the front of my thighs, the outline of my stocking tops and garter belt visible to the boys. I started my regular lecture on anatomy. After a few minutes of pacing back and forth in front of the room, I sat at my desk.Continuing the lecture, I gave. ” “I’m sure you’ve heard that when you have your own place you can do whatever you want.” I walked to the fridge to get a beer. I noticed one is missing. “Do you want another beer?” “No, I’m not done with this one,” she said in a matter-of-fact tone. I opened the bottle in my hand as I turned to see her holding a half filled bottle in the air. “Your mom wouldn’t like it if she knew you were drinking a beer.” “Well, you said to help myself to something to. Nicole’s fingers were also inside Trisha’s tight pussy.“God Nikki, you’re so good at that. I’m glad we practiced all those times,” Trisha moaned.“Wait, what…?” I asked, confused.“You think we haven’t been planning this?” came Nicole’s muffled reply.“We’ve both wanted your cock for a long time,” Trisha’s declared.“I’m sorry I couldn’t wait until Alex left, Trish,” Nicole said.“That’s fine. I didn’t mind watching.”I’d been setup, but I didn’t care at all. I just wanted Trisha to keep going. Maybe. “Don’t call the police! I don’t want to go to jail!” I finally managed to blurt out.I tried to squirm off of her lap, but wound up instead with my crotch resting on her bent knee. It felt good, especially when she slapped my bottom a couple of more times. I may have moaned. I just remember Cindy saying, “Oh my god! The little pervert is humping your knee! He likes it!” I was not certain what humping meant, but my privates were indeed liking it, which meant I was too!Sylvia rolled me off of her.