She finds him so attractive but at the same time doesn't want to have sex until he starts rubbing her pussy. Once he undresses her she turns into a natural whore, she would make any whore proud.
She was nervous she actually expect to bled all around but she was surprise, then sudden she remember horrible past when she lost virginity with someone very close the her family.
He couldnt watch her anymore wearing too short skirts and fixing stockings every 5 minutes. He decides that his cuming in pants must be stopped once for good!