Grouse- 1. To grumble; complain. 2. A complaint.
Narcissa was sitting before the fire in the Common Room, trying to get warm after her walk back from Herbology, when an icy pair of hands clapped themselves over her eyes.
"Guess who, Cissy!"
"Bella! Get off, you're freezing!" Cissy whined, pulling away. Bella smirked.
"Honestly, Cissy. One might think you're not happy to see your dearest sister."
"Not when you're this cold, I'm not," Cissy retorted, though the way her eyes shone as her older sister slipped her arms around her waist and allowed her to rest her fair head back against her chest rendered her complaint a lie.