Open the door gently and take a peek

Not wanting to barge in on a private moment, you open the door slightly and listen. Despite the music, you hear a male voice: "Ohhhh.... I love it when you do that!"

Hmmmm.... You aren't surprised your daughter is entertaining a guest on a Friday night! You listen some more:

"Play with his balls like this."

Surprised, you realize it is a different voice from the first, and it isn't Candy's. Filled with curiosity, you peek through the door opening. You can only see a portion of the room, but you see enough to see Candy on her bed, laying on her tummy, with her face between the legs of a muscular football player. His pants are pulled to his knees, and you see Candy expertly licking his shaft and fingering his balls.

Also on the bed is a girl you have never seen before. She is partially-dressed and watching the events while running her hand over the guy's balls.

You'd like to see more.