A person who is knowingly bent on bad behavior, gets upset when better behavior is expected of them.
Jane AustenI particularly recollect your saying one night, after they had been dining at Netherfield, 'SHE a beauty!--I should as soon call her mother a wit.' But afterwards she seemed to improve on you, and I believe you thought her rather pretty at one time." "Yes," replied Darcy, who could contain himself no longer, "but THAT was only when I first saw her, for it is many months since I have considered her as one of the handsomest women of my acquaintance.
Jane Austen