She inhaled deep. "Jesus that head is thick." I slowly went deeper inside her. By now she'd thrown her thong to the ground and had her hands on my fac.... We were kissing again, in no time. I was fucking her so deep, she was so tightly clenched on my cock, I was so in lust. She was moaning, breathing hard, matching each thrust inside her. "God I'm cumming," she said. She pulled my hair with one hand—gently—and gripped the cushion of the sofa with her other hand. Her pussy really clamped down on. So I checked my sides to confirm. But it was just me and her at that place. Looking at my confused face she smiled and questioned, “Are you OK now?” I didn’t answer. I just kept staring at her. Then she waved her hands to catch my attention and she gave a confused look.In between this Kumar called my name on the other side. So, I just responded to him. He waved ‘Hi’ to the girl and she too greeted him with his name. He came closer and introduced me to her. She was Celina. She just controlled. Fourth Week. Now that I know she hangs out in her office alone for an extra hour doing paperwork and such, I can initiate what I plan to do. Nobody comes into her office at all. I will be perfectly safe. The week goes by smoothly. Finally it's Friday. I come to school nervous and excited. I have never felt this way before. Today goes by extremely slow. I get to 6th hour and she has no idea what’s going to happen to her today. The end of the day, the bell rings and every one goes to the locker. " Oh," was all I could say."But you two have been doing it a lot lately, and you've been discrete and I can tell it's mutual between you two... Actually, if I hadn't already known from catching you the first time, I wouldn't even have really noticed you two sneaking off together all the time." Then she paused before adding, in a concerned voice, "It is consensual, right? You're not taking advantage of your little sister, are you?" No," I said, feeling I needed to make that clear, "it's totally.