Her mom was when she was twelve. Twelve. This meant that she had no idea of anything that had transpired at the Salvatore school over the last two years. She had no idea about Josie using dark magic and almost killing her sister during the early merge ceremony. Josie swallowed, unsure of how much she should tell her mom, especially about more recent events in her life.
"I guess I'm from the future. Well, your future," Josie replied carefully. "I guess this place pulls people from all over their own timelines. I'm seventeen now." Josie equated this to magic somehow since she didn't know how to explain it otherwise. This place was somehow powerful enough to pull them from their worlds into this one, no matter where the hotel happened to be located at the time.