How can one atone for giving a bottle of alcohol to a female guest at school under duress?

The Messenger of Allah, peace and blessings be upon him, cursed ten regarding wine: the one who presses it, the one for whom it is pressed, the one who drinks it, the one who carries it, the one to whom it is carried, the one who serves it, the one who sells it, the one who consumes its price, the one who buys it, and the one for whom it is bought. One must hasten to sincere repentance from providing wine, and resolve not to return to that, for repentance erases what came before it.