From Protector of the Grey House:
“Even after seven years?”
“She’s hunting a vampire and is still human. She will one day catch the vampire, but what happens when she does? Will she stay with us, ask to be turned, or will she leave and turn Slayer? None of us know and we won’t know until her quest is finished.”
“Is that why you haven’t shown her your actual bedroom?”
“Among other reasons, as well you know.” He gave Joseph a pointed look.
Joseph raised his eyebrows. “You could remove those items.”
“They would cause more trouble elsewhere.”