How much time do I give her?

ok so here's the deal... my ex (who i've been trying to get back) has been in jail for almost three weeks now. her court date is in a few days and depending on the result she may be put back in for four more months or they might let her off easy since she's already served some time. anywho... her new bf (the rebound guy she dated right after me) broke up with her while she was in jail cuz he said he wanted a gf that he could see. he's a dick and i hope he rots in hell but anyways... she's been saying stuff when i go to visit her like she's been dreaming about me and even asked if i would take her to her favorite resturaunt when she gets out. i'm starting to think she wants me back but i don't know. what do you think? her douche ex bf hasn't and refuses to visit her so i've had alot of one on one time with her. i want to make a move but i'm not sure when i should make it. should i wait till she gets out? do i still go and visit her? do i play hard to get? if so how?