Katie sees someone poking through the window.

"W-Who's that?" Katie said, squinting through at the door.
"Huh?" Harry said, starting to look in the same direction as she was.

There was a medium very dark brown-haired young man with light skin at the door, peering a bit through the glass, but then gets startled slightly, as he realizes that they have taken notice of him and he perk up straight, blushing immensely.
Harry got off of Katie as she started to get up. Her bigass wood of a 12 inches long and 2.5 inches wide was at half-mast, swinging like a pendulum and smacking against her thighs as she walked over to receive her new prey.

His face turned a deeper Red when she opened the door.