Chapter 51 Tricking My Sister

• My sister's boyfriend and me are very good friends. He's been dating my sister Karen for over two years now. From the first day he started fucking her, he gave me all of the details. I watched them once fucking. Jim, my sister's boyfriend agreed to leave her bedroom door open. I watcher him eat her out. She really loved that. When he started fucking her it made me cum in my pants. My sister is very good looking. Any guy, included me would love to fuck her.
• One day while hanging out with Jim, I got an idea.
• "Jim, we're the same age, and we have the same built."