I was eighteen, living and working on my parents farm. I'm shy and don't go out much. My grandmother, Grace, who had just turned sixty came to live with us after grandpa, Bruce, had died. Grandma Grace has always been a very active person and she joined local social and sport clubs and went dancing there.
A few months back, my parents went away to a convention for a week. This left me alone with Grace as my two younger siblings went with my parents. Grace cooked meals for us while I looked after the farm. The family left early in the morning, just after breakfast. I started work after breakfast and around 10 o'clock I went into the barn to masturbate, it's where my dad hid his stash of playboys. Ever since I found his magazines when I felt the need I'd go out to the barn, flip through a magazine and jerk off.
I was tugging away when Grace came into the barn looking for me. She didn't call out, which was why she was able to catch me behind the hay bales, cock in hand, about to finish.
I was shocked, to say the least but all she said was I'm glad to see you're a normal boy after all. With that she told me to put it away, and that she wanted me to open a jar for her.
So I went back to the house with her, after I had opened the jar.
I was just about to leave, when she asked If I had ever seen a woman naked or been with a woman?
I answered No.
She replied It's about time you did.
Not sure what she meant by that. She walked over and took hold of my arm and told me to come with her. She led me from the kitchen to the front room then told me to sit down on the couch, I did as I was told.
Then she put on some music and started to undress while doing a little dance as she did. At first I felt this was, well... all too weird but then her bra came off and my focus was on her D cup boobs shaking and jiggling. That weird feeling was gone in a flash. I later learned at one point in her life Grace had been a stripper.
Shortly after her bra was off, she was down to just her panties. She rubbed her crotch through her panties and then slowly slid her hand inside the panties. It was clear by the movement of her hand she had begun playing with herself. At this point, I had a rock hard cock. If she was going to touch herself in front of me then I could too and started rubbing myself through my jeans. That when she made a show of removing her panties.