This happened about thirty years ago. My Aunt Madge would come visit us several times a year. She always slept downstairs on the couch. One night, my older brother was on an overnight camping trip with his friends. After my sisters went to sleep in the next bedroom, I crept downstairs to see what was happening. To my surprise, Aunt Madge was in bed with my folks. She was giving Mom oral sex as Dad was doing her. Then, Dad was giving Aunt Madge oral sex as she was still doing Mom. I went back to my room and masturbated several times that night. I have never told anyone about what I saw.
— Curt, 49