Pearls
Thank You for the ask! I've never tried PottsandPans before, so this is an honest first attempt!
He can't stop watching her reflection in the mirror.
From this spot in the hallway, Harry can watch her get ready without being scolded for staring or breathing too loud, or "judging her outfit" when really he's no opinion on them at all. He can see the reflection of a wall of mirrors that cover their closet doors and watch Pansy wander past in various stages of getting dressed, mumbling to herself all the while.
Now she's in a black dress, with a low neckline and only sheer material in the back top half. Just the amount of skin available for him to gaze upon is enough to stir something in him, and she hasn't even turned around.
"Harry." She says beckoning him from his hiding place. "What jewelry should I wear?" When she's turned all the way around, any number of excuses to skip the event and stay home and ravage her instead come to mind. Without a word, Harry goes to his dresser and opens the top drawer, pulling out a velvet case. Holding it open he shows her a set of pearls: earrings, bracelets, and a necklace. She turns, lifting her hair so he can clasp it on her. When it's one, he plants a few kisses on her shoulders, fingers resting on her hips. The little perfect circle fit perfectly, luminous against her skin.
"I keep thinking something dirty," she whispers, watching their reflection in the mirror.
"Me too." He admits, pressing his length into her.
"Close the door then, we have a minute to be fashionably late anyway." She says with a wink.