Originally Posted by
Inversed
It was then expanded upon in the Spider-Man story Venom Inc. when she teamed up with Spider-Man, Venom, Anti-Venom, and Mania to take down Maniac, who was using his symbiote powers to infect everyone in Black Cat's crime syndicate and all the others, completely tearing them down and ruining Felicia's reputation. Realizing she lost everything, Venom recommended her trying to be a hero again.
Jump back to the Defenders book where she tells the Defenders her crime boss days are over and she wants to be a hero again and gets off on her prison sentence by helping them locate the Hood..