Gradually, his dick became firmer and began to rise, until it was contained by the ass pressing down on it. This pressure only succeeded in causing it... to become more rigid, until it was like a bar of steel. He could feel the crack between his mother's legs, and finally, her pussy, as the rigid shaft forced itself against the spread cheeks of her ass. There was no doubt she could feel the hard bar against her pussy, but she made no motion or comment that indicated she was aware of his. Everyone including me started secretly eyeing her grand exposure. She was looking at my eyes only, as if nobody existed for her. She threw her top towards me to catch then I saw the bikini top, which was very small on her 36DD boobs. Her boobs were showing from all four sides. Then she started to take her shorts out and in a second it was in her hand. She threw that to me again but her cheeks were red now. She came to me and said, are you really sure. I looked at her bottom, my god only. We finished our laps and decided to grab an early dinner on the way home. We’d meet back in about 20 minutes. I headed to the mens locker room and she to the ladies.I opened my locker and grab my towel. I slid my trunks to the floor and headed to the shower stalls. The water had been a little chilly so I wasn’t impressing anyone but then there wasn‘t much of an audience anyway.I walked to the end of the row of stalls and just as I was entering it, I heard a soft familiar giggle behind me. I. ” He went into the library and the librarian called to him.“Are you Tom Armstrong?”“Yes, ma’am.”“Okay, I was told you’d be coming in here today. I expected you earlier.”“Well, I thought I was to go to my home room first this week. I believe that was the arrangement.”She nodded, “That’s all right. The custodian brought that screen in here a few minutes ago,” she said, pointing at it; “the head teacher said you were to use it to screen off your study area. I wasn’t sure where you wanted to sit,.