John snatched the napkin up and waved it in her face. "Have I not told you, emphatically and repeatedly, never to fraternise with my scum-sucking brother? How many times do I have to make it clear to you?!" He scowled and screwed the napkin into a ball, which he threw across the room. "You will respect my wishes, Isabelle. You will." He didn't quite go so far as threatening her, but the warning was clear. Or else.