Well, with Kaycee we still don't know whether Leoben is lying or telling the truth, but either way, I'm afraid the little girl is for the chops. Meaning I think Kara will first bond with her and then kill her in her final and successful attempt to escape, and that it will mess her (Kara) up beyond belief, but she'll do it.

However, Hera'll probably survive, though right now Roslin, Cottle (not on New Caprica) and Tori are the only ones who know a) she' still around, and b) who she is. Which makes me wonder: about the only thing Six-in-Baltar's head told him which he couldn't have figured out himself subconsciously (i.e. the one thing one can't explain by him hallucinating) was Hera's existence, back in "Kobol's Last Gleaming", and then later her birth in the cell. Will she tell him again, and/or will Roslin (not likely) or Tori (possible, we don't know much about her)?

Baltar couldn't protect Hera when she was born, but he did an effective job of saving her from abortion earlier on by figuring out a reason that prevented Adama and later Roslin from insisting on the order, so who knows what the knowledge might cause him to do?