Lydia Hardy was the wife of Walter Hardy, a somewhat retired cat burglar; they eventually had a daughter, Felicia, who idolized her father.
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History
Although largely retired, Walter Hardy still committed burglary, explaining his frequent absences to Felicia by claiming to be a traveling salesman; the family didn't live remarkably well off the money it brought in, and Walter could have made money in other ways, but he was addicted to the thrill of crime.
When Felicia was thirteen, Walter was put in jail for a crime he didn't commit; he asked Lydia to tell Felicia that he'd died in a plane crash. Although she did so, Felicia soon found out the truth. Felicia, as the Black Cat, broke Walter out of prison and brought him home. Lydia had a brief reunion with Walter before he succumbed to his illness.