"No, I don't." she said with a shake if her head, "But I think I have a reason to be worried. They would have killed us after we had taken care of the Charmed Ones for them. They didn't care about us, Christy. But I'm worried you see them more as a family." And they weren't, they never would be. Once the Charmed ones were gone they would have turned on Christy and herself.
The sisters had each other. Wyatt said Billie was like family, but she had a hard time believing that. Not to mention Paige and Phoebe didn't even know who she was here. "You're the only family I have, of course I want you to come home." she paused for a second, before breathing out a short laugh. "Whatever that means anymore." it wasn't like either of them had a home to go to anymore.
If Christy checked her head, Billie wouldn't be upset. She was being honest. She did want her sister back, but she did have worries. How could she not? But she wanted things set right.