Back when I was 17 years old a new student had come to our school and we quickly became friends. It was a few weeks before he invited me to his house for the first time. It was a very nice eye opener. His mother was there and she was tanning naked by their pool. She was tanning her backside so all I saw was her ass and a very nice ass it was. When she noticed us there she introduced herself. I thought she would cover up but instead just stood up and I got the full frontal head to toe view. I don't know how my reaction to seeing her naked was appearing to her but it must have been apparent I liked what I saw. She suggested we go for a swim and my friend dragged me to his room to get ready. In his room we stripped down and I was expecting him to loan me a swimsuit but instead we walked down to the pool and swam naked. For the first time ever, there I was swimming naked in the presence of others one of who was my friends naked mother. It was embarrassing at first but I quickly got used it and began to like being seen this way. My friend stepped away for a few minutes once and I recall her legs being spread open. I must have been staring right between them. She laughed and smiled and was looking right between my legs. I had a hard on. My friend came back so I quickly jumped into the pool to hide myself. It could have only been in my mind but I think during my whole time there his mother was teasing me when he wasn't looking. Eventually we finished and got dressed.