She listened to him rant and watched him eat his sandwich (the benefit of having so many brothers was that disgusting table manners didn't phase her), even considered a sandwich of her own had she not already eaten one of mum's breakfasts of guilt.
Ham+eggs+toast+mum's excessive worrying=one deluxe breakfast of guilt. Why she hadn't moved out again? Oh, yeah. Saving money.
"Who said I'm moving out?" She raised an eyebrow, plucked the firewhiskey from his hand and looked around for two glasses that seemed even nominally clean. "You said that, not me. I've a ton of space to myself and, unlike you, I'm actually putting money into Gringott's."