The other secret began at mom's birthday. One of the things that had been purchased at the sex-shop was a penis casting kit. This particular one allowed a partial casting of the ball-sac as well. At some point, the girls had gotten me particularly hard and had made a casting of my member and the front half of my scrotum.
I'm not sure whose idea it was, but one or more of my lovers made a dildo from the casting and gifted it to my mother for her birthday. As soon as I saw her pull the thing out, I knew what it was, and I was mortified. Mom's only...