"Ginny, dear, would you go check on Harry?" Molly called from the kitchen, "He's been in his room for a while now and we don't want a repeat of the Lethifold incident."
Ginny glanced up from her Potions homework and, studiously ignoring Ron's solo game of Gobstones and whatever explosives Fred and George were working on, made her way upstairs. Harry's bedroom door was right on the second-floor landing, just down the hallway from Sirius' room.
As she approached, she noticed a quiet, rhythmic rustling coming from the room. An icy cold gripped her chest and she reached for her wand, the incantation for the Patronus charm on her lips ready to save Harry from the evil black sheet. Her hand had just closed around the knob when she heard a soft moan and a single whispered word:
"Gin…"
The rustling sound came to a stop, replaced by deep, heavy breathing. A bed creaked, and Ginny, suddenly aware of her situation, snuck back downstairs as quietly as her embarrassment-fuelled haste allowed.