I dreamt that I was waking up from sleeping. I got out of bed and walked towards the bedroom door. Suddenly it looked like the door had turned into a mirror. I saw myself. It looked unreal, I focused my gaze and looked towards the door to confirm it was a mirror. It was not, it was my late sister standing there, smiling at me. I shook my head at her and said :”Sis, you are supposed to be dead”. She looked at me smiling and responded:”Not in my time line, only in yours.” I told her that I did not understand what she meant. She looked at me and said:”I know you can travel between time lines. Right now you are the only one who can take me back to mine.” In the dream I knew exactly what she was talking about. I went to my cupboard, took out two pairs of sneakers, told her to put one pair on and I put on the other pair. I told her to prepare for a lot of walking. As sisters do, I took her hand and we started walking, I was taking her to her own time line where she would continue to live. She could not return to it without my help as I am the only one in our family who can travel between timeliness. That was my final realization before I woke up.

What does all of that mean?