[Bay lets out a sigh, it's slightly louder than she meant it to be but in her defense she has no idea how loud it was. She knew anyone would ask with that sort of set-up, but it was still a crazy thing to explain... if you hadn't woken up in a magic castle dragged out of a fountain.]

I woke up having swapped pasts with my sister. As if she grew up in my life, and I grew up in hers.

It's more complicated than that, but that's a much longer story.