I don't think that's entirely correct, though. At this point, she's been back in the Bat-world for a little while, which presumably means she's had regular contact with Bruce, Alfred, Babs and Tim. (Bruce, Alfred and Tim because she's working with Batman on the Outsiders, and she was staying at Wayne Manor at the start of her mini, and Barbara because although there's no mention of it in Outsiders at this point, there's no way Babs wouldn't get in touch.) So her Bat-family is sort of okay, albeit it's got to be weird being back after her absence.
But given her history with Cain and Shiva, yeah, she would definitely want to keep Cain and Shiva away. Also, I could be mistaken, but I think this issue may have come out during the run of the Batgirl mini.
Oh, an we can mention/post the mini. It just makes me cry tears of frustration, is all. =(