Sharing my Sister's Boyfriend

My sister is thirty-nine, and she and her boyfriend moved back to our parents' home when he lost his job. She only works part time. They live in our parents' finished basement. The washroom is located in the basement. So, it became my habit that whenever I had to use the washroom, I would knock on the basement door. One afternoon, I knocked on the door but no one answered. So, I figured they were out. I walked downstairs and started to do my wash. He walked out of the bathroom nude. I don't know why no words were said, but we feel into each other's arms and had the best sex ever. We get together at least once a week when my sister is at work.

— Marilyn, 30

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