My first sexual encounter with my sister happened when I was driving her to Chicago. My sister couldn't afford a plane ticket and her car had broken down the week before. So that is how we ended up driving down Interstate 80 when a massive storm front came down from Canada. It started to snow right after noon, and by sundown it was coming down quite hard. I was glad to find a motel parking lot before the road got totally impassable. Shortly after we had pulled into a motel parking lot, the Highway Patrol announced that they were shutting down the roads until the roads got better and the road crews had a chance to remove some of the snow for the roads.
So there was me and my sister Ruby together in a cramped motel room with just one bed between the two of us and the temperature outside dropping faster than the room's heater could possibly handle. There was no thought of awkwardness as we huddled together under the sheets for warmth.
After awhile, I fell asleep. A couple of hours later, I woke up with a hard-on, spooning my sister. As I started to move awkwardly away from her, she spoke.
"It has been a long time since I woke up to find a hard cock in my bed."