TPR Questions

I'm sorry if this is a little long. Our current placement is a sibling group 7 year old, FD and 3 year old, FS. Our FD was recently diagnosised with autism. We are their third placement (second in foster care). They stayed with family members 2 months & have been in foster care 15 months for a total of 17 months out of their Birth Mom's care (BF is not involved & signed a denial, they filed on him as well, but I'm not worried about him). We have had them the past year & plan to adopt. Our FD cries saying she doesn't want to go back & that this is her world now and has no bond with Birth Mom (even calls her by name) & an intense bond with our family (she calls herself our family name & says her last name is her old name). Our FS doesn't really know his Birth Mom as a mother at all. Goals were changed to adoption in June (14 months, after given an extention). This month, they've filed the paper work for TPR. We're now waiting on them to serve (if they haven't already) & to set a court date, which we already know we have to testify at. My question is that, with it filed, if she starts making more progress between now & the trial date, will they postpone TPR or deny it? She had a relapse on heroin after 10 months in state care (really she was never clean, but that's when she admitted it), then went to "rehab" right at her year mark (which is why she got the extension on goal change). Since, I believe she's tested clean (5 months total, including while in treatment). However, the rehab was only 6 weeks and the judge wasn't too kind about it. She is going to some NA meetings but the judge said not enough. They also said they will have to monitor a very long time to believe she's clean & going to stay that way due to the late relapse. The only thing she's completely finished was the parenting classes. She's done SOME of the drug classes but has about 10 more weeks if she goes to every one. The real issues are that she has still failed to gain employment but now she's getting interviews (so progress) & that she has bounced from place to place, even spending months in a homeless shelter. She's now staying in an apartment with a friend (technically progress as well) but the kids can't go there because it's a studio apartment only. & the people she's staying with also have a CPS case open. Her boyfriend of 2 weeks is also now living there & he does drugs plus stole a gun (she posts this stuff on FB publically!). Her decision making still isn't very good... They also said in the visits she doesn't demonstrate good parenting skills still & that she doesn't interact with the kids or know how to control them. Her visits have stayed the same the entire time we've had them (every 2 weeks, 2 hours, supervised, staff in the room). She doesn't get phone calls at all and hasn't in over 8 months (besides FD birthday, supervised by SW). She's actually been making really inappropriate comments that have caused our FD to require anxiety/depression medication by saying things like, "she misses her so much she cries all night long" "our FD has been here too long" "she dreams about them" "she misses waking up next to them" and on & on. She isn't finished with the case plan or even close... Much less been monitored to be stable. At this point, I don't think they can argue that it'll be in the kids' best interest to postpone the TPR, especially with our FD being autistic and our FS being so young. However, until they've granted TPR I'm going to be a nervous wreck so I just wanted input on whether or not you all think there's a chance they'll give her a break after all this time. Also, I was curious if anyone knows roughly when we can expect the trial date to be set (we're in KY)? & if anyone knows if she is still receiving services from DCBS or if they stop pushing once they file (I don't know if they keep offering and pushing or if they'll just help if she comes to them now)? I realise the date can be postponed, case extended, etc but I doubt our judge will put up with it (she has been scheduling 6 weeks out max). Thanks for any help!