She rolled off him to the floor and lay flat on her back, trying to catch her breath. I reached over and gently massaged her breasts.

"Whew," she said, "I don't think I can take anymore tonight."

I pretended to be shocked. She playfully slapped my thigh.

"Stop it! I'm too drunk and tired, but tomorrow is a different story."

"Look, the blowjob was great. But I'm not ready to start fucking my sister."

"We'll work on that," Brenda laughed.

"Shit," I said, "your wife is upstairs passed out on the floor. I was coming to get you when I caught you two in the act!"

The three of us...