Impatient by David Lawrence

She picked the time and place for her coming-of-age party. Roz tried to be nonchalant as she guzzled the cold beer. By the time she had to gasp for breath, the beer can was nearly empty. It helped, she decided. It helped lessen the unwanted nervousness and unexpected impatience. 'That's enough,' Larry murmured. 'I don't think a girl should get drunk on her eighteeth birthday.'