Foursome!

From Torg Adventure

Your father goes to sleep, but the excitement and anticipation has you wide awake. You take off your shirt, and notice you stink a little, so you take a quick shower and put on deodorant and clean clothes. The storeroom doors opens and your mom sticks her head out, smiling at you. It looks like she's naked. She crooks a finger at you, beckoning you inside.

You go and open the door and close it behind you. All three of them are naked in front of you.

Your mother says, "We decided that the most fair thing would be for us all to have you."