Pinky Pinkston was the heir to her father's fortunes via the Pink Chip Stamps Factory. But she wasn't the only daughter of Pincus (Pinchas?) Pinkston - as a result of an affair he had with another woman, the elder Pinkston was the father of a young woman named Lisa who was Pinky's identical half-sister. (A closer genetic possibility than an identical cousin, you have to admit!)
Lisa may have been disowned by her father, rebuffed by her half-sister, and so in retaliation she turned to a life of crime. In alliance with Jervis Tetch, AKA the Mad Hatter, Lisa helped kidnap the various members of the jury who put Tetch away in Gotham State Prison......
(Diane McBain played both roles.)
BCnU - same Toob-time, same Toob-channel!