When the rest of the school returned, our fun died down a bit. We were used to being about to fuck where ever and whenever we wanted because there was no one around, but that changed. For the first few weeks after the Christmas holidays we were lucky if we could get time to have sex once a week.
Around the middle of March we were sitting out in the garden of the school as the nice weather had started to return when I noticed that Sofia wasn't wearing panties. I had gotten used to the idea of her displaying he privet parts around me, and I had seen her pussy a lot during Clair and I's sex sessions as he masturbated herself, but something about seeing her like this in front of me made me stare, and not move my eyes away.
"Jake you’re staring at my pussy again" Sofia said suddenly.
"I know" I replied.
"Why aren't you staring at my pussy?" Clair asked.
"I can't see yours from here babe" I told her.
“That’s not the real reason we all know it” Clair said. “Admit that you want to fuck your sister”
“I admit it, I’d love to fuck you Sofia” I admitted.
“Let’s go somewhere to make your dream come true” Clair said getting up off grass.
We all got up and followed her to the classroom section of the school. There was no one around as classes finished early on a Wednesday. We went into Ms. Baxley’s classroom, which was smaller than the others and had a blind on the door window as she is a guidance counselor and likes to have privet one to one talks. We closed all the blinds and Clair and Sofia started to strip. I stripped off too and I was then pushed into Ms. Baxley’s chair by Sofia.
“You’re going to enjoy this” Sofia whispered in my ear as she kissed her way down my body. When she reached my cock she started to wank it slowly. She kissed the tip of my cock and then licked down the backside of it. She took her other hand and started to fondle my balls, while still wanking my cock. She took the top of my cock in her mouth, swirling her tongue around the tip making me groan in pleasure.
Suddenly Sofia moaned very loudly. I looked at the floor and saw that Clair was lying beneath her licking her pussy. Sofia started to take more of my cock in her mouth, she nearly took it all. She kept taking my cock in her mouth until she gagged.
“Are you ready to fuck your sister in her tight virgin pussy?” Sofia teased.