looking at the timeline, it's entirely possible she could have babysat for charlie when she was little for a bit. charlie and her dad moved out of boston at the end of 2001, but her mom was sick prior to that so in between hospial visits and everything else, they probably needed someone to watch her. charlie would have been 5/6 at the time, and if i'm doing my math right i think that might work. charlie only moved back to Boston in 2009 afterwards, so i don't think they would have likely crossed paths too many times again before now.