Reluctant step-sister caught before party

Description: I'm home alone getting ready to go to a club relaxing and having fun and opening a bottle of a drink i've hidden weeks ago to be ready for a party! suddenly my step-brother appears and catches me with it. if he tells our parents i'm fucked! they are very strict about it. but maybe it would have been better if he had told them, cuz i was literally fucked anyways..