My wife's granddaughter, Ashley, came to live with us when she was 18. She is 5'10", with wonderful 36DD breast that she loved to show off. She also has the most enchanting green eyes and wonderful mouth and smile.
She loved to lay out in the sun, in tiny little bathing suits. She would drive me crazy by running around the house in just a t-shirt and panties. I started to have thoughts of her in a very erotic manner. I would catch my self looking at her and dreaming of about what she felt like and what she tasted like. I tried to resist these urges, but the more I tried the harder it became. I began to thing of a way that I could seduce her.
My opportunity happened on the day she was graduating school. She had been stressed and had a severe headache. I offered to give her a neck rub and she said ok. I had her lie on her bed and started to rub her back. I suggested that she take off her shirt so I could give a better massage. She removed her shirt without hesitation. Her skin was very soft and the more I rubbed the more she relaxed. I worked my way down her back to right above her lovely ass. I told her to undo her pants so I could do her legs, she surprisingly did so without any hesitation. Now this gorgeous 18 y/o girl was lying on the bed in front of me in just her red panties and bra. My mind was racing, my dick got rock hard and I slowly worked my way up her right leg from her foot to her thighs, she slowly spread her legs to allow me to get more of her legs. I thought I heard her softly groan but convinced myself, I was just hearing things. I then started with the left foot and worked my way up that leg, again she parted her legs without hesitation. I then heard her grandmother come in downstairs and had to stop at that time.
Later that afternoon, while my wife was out, I went to my room and lay on my bed. I closed my eyes and pictured those red panties and the feel of that lovely soft skin. I pulled out my cock and began to picture what she would look like with nothing on and with me slowly running my tongue up and down her thigh into that nice young pussy. I was moaning and started to call out her name. I had the most explosive orgasm that I have ever had while masturbating.