You have a viewer

Kaylee leans back, licking around her mouth to try and reach the spunk sliding down her face. As she does, her eyes drift upwards and widen in shock. "Oh, gorramit...!"

Confusion crosses your face, and your head snaps up to stare at whatever's startled Kaylee. A raven-haired, limber young girl hanging acrobatically from the pipes on the ceiling, looking down at you with a look of curiosity on her innocent, pale face.

"River, what the hell are you doin'?" exclaims Kaylee, forgetting about her cum-covered face as she stands. River drops down between the pair of you.

"I don't understand..." she admits in a disconnected, dreamy way. "There was no benefit, after all. No procreation in that act...why did you do it?"

Before you can answer, she turns her attention to Kaylee and observes simply, "You have semen on your face."