I than reached up and began doing chin ups on the timber beams facing the pool, my mother in law just stayed in place watching me raise and lower my body. I could feel the sweat running down my chest and abs. My mother in laws eyes changed whilst she watch me raise myself up. The more repetitions i did she started to get a glazed look on her face and her cheeks were flushed. She continued to float and seeing her ass facing up with that glazed look sent the blood flow down to my groin.
I dropped down off the beam and subtly pushed the hardening head of my cock down the leg of my briefs whilst pretending to stretch my leg. I then hopped up for another set of chin ups. When I looked back she had rolled onto her back again on the side of the pool. Her face was still flushed but her eyes were closed and one of her arms was under the water.
I suspected that she was touching herself barely a few meters from me whilst I did more chin ups.
As I finished my chin ups I started doing squats, she turned and looked at me briefly before returning to lay back against the wall holding on with one hand. By now my mind was convinced that she was masturbating under water thinking of me! As I finished my squats I asked if I could join her In the water. She replied "in just a second can you get me another glass of sparkly?"I returned two minutes later glass in hand. However as I made to enter the water she asked if I could help her out. I lowered a hand to her and she stood on the top step. Her face was visibly flushed now and her chest was rising and falling rapidly. Her nipples pushed against the gold fabric of her one piece. As she stood we were mere centremeters away from each other! As I helped her up to the top step I could see the crotch of her gold one piece hugging every part of her vagina. It was very puffy and I could make out her inner lips. She then reached over to the fence and grabbed her towel which she wrapped around her body. She then appeared to get embarrassed lowering her eyes and shuffled inside to the kitchen.
I immediately jumped in the pool and tried to do a couple of laps however whilst I had I had a break I thought about what I had seen. I then looked up into the kitchen window and could see the mother in law in the kitchen preparing dinner. She saw me look at her and smiled, I reached down and removed my cock from my shorts and behave stroking it whilst looking at her. She seemed to stop what she was doing and maintained eye contact with me. I continued to stroke my length whilst looking at her. She smiled once more and i continued stroking until I came a couple of minutes later.