“Let me just finish closing up the room and I’ll be down in a few minutes,” I said as I began to unbutton my lab coat. He nodded but stood roote..., watching me removing the coat. I laughed, “Sorry, all I’ve got on under here is jeans and a T-shirt, if I’d known I was going to get a nasty proposal from a naughty student I’d have worn something more appropriate…although I have to say, I’m not entirely sure what is appropriate attire for such an occasion, it’s never really come up before.” He. We fucked for several minutes and I felt my cum starting to rise, out of the corner of my eye I caught some movement behind some bushes, I slid my cock slowly from Jenny’s pussy and whispered for her to look at the bushes. I continued to slide in and out of Jenny but without as much enthusiasm as before, I really wanted to see who was there and how Jenny might handle this situation. Jenny told me to lay down she wanted to ride my cock, so I pulled out, laid down and watched her pussy engulf my. Pardon the pun. The idea was to tow her through the water, she would just float and I would pull her along, holding her across her chest ... her breast nestled nicely in my hand. She never said no to the game and she never told me to stop ... we just kept at it until I was tired. We practiced this a couple of times a week for a couple of summers.I have no idea if she was even aware I was feeling her up ... and I was so young I really didn't even realize exactly what I was doing. I just knew her. ”There was no homework tonight except for some reading from text books, so that was quickly done. Sue and I went to bed and cuddled as we discussed Mom’s revelations. We were both still awestruck by what she had said and what she had offered to us. We were particularly taken by the thoughts of a swimming pool where we could skinny-dip and fuck. I was too tired to fuck, but later on that night I did give Sue a round of cunnilingus. Neither one of us had any trouble getting to sleep after.