I was taking heating and air conditioning in trade school. That's why Grandma called me when her furnace quit working. I knew quite a bit about fixing them already. It was a bitter cold winter's day when she called. She lived about 70 miles away, so I loaded up my tools and headed towards her house.
Mom suggested that I spend the night at Grandma's instead of trying to drive the icy roads at night. So I arrived at Grandma's house, and looked at her furnace. It needed a part that I didn't have with me. I called and they told me they could have the part for me the next morning. I told Grandma the news, and she made us a cup of hot chocolate. It was pretty cold in her big old house. I tried to talk her into coming to our house, but she was a stubborn 55 yr old woman.
It was getting fairly late, and she suggested that we turn in. I climbed into the bed in the guestroom, and lay there shivering beneath the cold sheets. A few minutes later I heard her call my name. "Why don't you sleep in here with me" she suggested. We could keep each other warm."
It seemed innocent enough to me. So I headed towards Grandma's bedroom. I climbed into her king sized bed with her, and we snuggled beneath the blankets. Sure enough I was warming up quickly. I lay next to Grandma, feeling her warmth. My crotch rubbed against her ass. My cock began to stir. I tried to back away, but she followed me. My cock was now fully hard, and it pressed against her soft ass.
Grandma reached behind her, and began to stroke me through my long johns. Her fingers worked their way into the open fly, and she touched my naked cock. It throbbed excitedly as she gripped it with her soft hand. Grandma moaned as she began jacking me off. Suddenly she rolled over.