He joined the girls on the floor.

I watched my wife and her best friend passionately kiss and I had a flashback of all of the times the three of us fooled around in high school. My mind slipped back to the unforgettable memory of Stephanie coaching Elizabeth how to give a blowjob, with me as the guinea pig, and my future wife swallowing the load I had blasted into her mouth (and onto her face, which Stephanie licked off).

"Do you mind if I join you, girls?" I asked, standing over them with my saluting erection.

"Yes, please!" Stephanie purred. "As much as it was fun being fucked by Elizabeth, I need a real cock in me!"

"And I don't want you to cum on our faces!" my wife giggled. "We're trying to get pregnant, remember?"

The girls rolled off each other and, letting the long, double-ended dildo slip out of their soaking wet pussies, they laid back on the carpet with their legs spread apart for me. I wanted to fuck them both at the same time but unless I suddenly mutated with a second dick I knew that wasn't going to happen -- so I had to make a decision with the dilemma I faced every time we had these orgies.