So Gramma and her friend have a habit of washing themselves in the creek that flows through our family's farm. I had seen this for years and thought nothing of it, though I always tried to watch them, being a horny 18 year old. It didn't matter to me that they were old or that one of them is my own Gramma.
I've seen Gramma lift up her loose skirt and wash herself. I've seen her take off her blouse and wash her pits and her tits then bend over and wash her hair with her skirt gathered around her waist to prevent it from getting soaked.
What really interested me however was her friend, who we called Granny. That Granny was a chubby woman with very large tits and a wide swaying ass. It mesmerized me to watch her from behind.
I made a special effort to be with her, especially near 'washing' time. I would pretend to be swimming nearby and she would proceed to wash herself. I would swim up as close as I dare and ogle her while she bathed. Many times she's seen me. At first she would tell me to go play. I was actually playing with my young cock below the surface of the water. I would turn away and finish my self pleasuring. I was sure she knew what I was up to but I was in a 'sex trance' and didn't care.
One time when I was about 19, I pretended to be swimming underwater and purposely swam into her, face first into her big wide bum. I stunned myself because my nose actually hit first. She didn't scream out, she just reached around and grabbed me by the arm and shook me asking what the heck I thought I was doing. My nose was numb and she saw a bit of blood so she took her wash cloth and wiped it away.
The thought of that wash cloth on my face was pure heaven because she was just using it to wash between her legs. In grabbing for me she had released her dress and now it was completely soaked. As she walked me back to shore the dress clung to her body and revealed her wide ass and thick legs for all to admire, though no one was around.
Everyone had gone back to the house which was about a city block away through the trees. She sat me down on a large boulder and tended to my nose. I lied that I was sorry for bumping into her but she told me its in the past. My nose stopped bleeding and she went back to the water to rinse out the wash cloth. As she did this she bent over allowing me to see her ass covered tightly by the wet skirt. My young cock got hard again.
She turned around and caught me staring at her. She stood up and walked back toward me and gave me the washcloth saying to hold onto it in case my nose starts up again. She then turned around and lifted her dress and revealed her very wide ass not five feet away from me. I gasped out loud and she heard me because she turned around and saw me fixated on her bum.