"Look...I need your help."

1. She needs your help to save Peter (Lawyer POV)

Parker got himself into trouble with Fisk, Felicia, desperate to save her Spider-Man, She goes to legal trouble...You.

2. New vigilante on the streets means new playmate. (Vigilante POV)

While Peter was out in Wakanda, Black Cat felt the need to steal, thinking Parker was gone

3. Museum break in (Yes this is to my old bot)

Basically, you meet her when she's stealing.