"We are till frieds," she told her, "Just shit happens and we need to live very far apart, it's the Slayer in us, but what's up?" she blinked in the darkness at her, moving a little closer so she could hear her.
Seems like Faith wasn't the only one with something going on that the other didn't know about, perhaps...no Faith won't tell her, Buffy didn't need to know that Angel was living with her.