She wanted to say that she didn't have to do anything, just to be contrary, but it was his birthday, and she'd already been leaning toward taking it. She wanted something to help her get over this funk, they'd gotten away from Death Eaters and she was still grousing over her wand... Worrying over how uncoordinated she felt with the replacement Bill had brought her.
She uncorked the bottle, and then rolled her eyes disapproving at him, but drank it anyway.