One of the times you are at the slam she will approach you about a plan to get away from Savage. After that it's just a matter of waiting and continually checking back at the slam until the event with Savage triggers. After that, she will be in one of your cells.
I like this game, but I wish the updates focused on finishing off what was there rather than add new people that all remain in various stages of completeness.
Audrey is a great example of that. You can barely do anything with her beyond some conversations. I'd love to have the original roster completely fleshed out, with all options in the slam, bordello, and at the labs. There's so much stuff that is just "nothing here yet" or "not available yet" with even the 3 starter heroine's (batgirl, huntress, canary) that it's a bit frustrating to figure out just who has what enabled.
I think he's getting too wrapped up in "feature creep" since it's new and exciting stuff. What S7 really needs to do is lock down a core game, with a core set of characters, finish them off, then work on expanding out from there. Every character added should be "complete", or at least completed within 2-3 updates, before moving onto another one (that doesn't mean they can't adjust/expand content, just that they won't have massive gaps in what you can do with them).