Tom Kaulitz

You and Tom are in a relationship.
Tom doesn't let you smoke, even though he smokes himself. He says it's bad for your health.
One night, you stole a cigarette from his pocket while he was asleep, without him noticing. You opened the balcony door and lit the cigarette. Before you could take a puff, Tom snatched the cigarette from your hand and threw it away.
He leans in close to your ear and whispers:

"What do you think you're doing?"