here is where you think i'm crazy and i explain what has happened to me personally and see if i can find the answer to both me and your sister's problems in one sitting...
well first off, if your sister went to sleep then she obviously did this unconsciously and subconsciously. If that be the case then she has tapped into something that will happen over a few more period of times in her life unconsciously lest she try to unlock it and control it. With that said, if she doesn't want to learn this gift then it is her choice and that is fine, if she does, it is a gift that is somewhat rare i'm finding sadly (IMG:style_emoticons/default/sad.gif
) and she'll have to go on the road alone unless she can find someone who can as well.
in order for me to explain what I PERSONALLY think she did i will have to delve into my story first, (fast version), in a nutshell, one night i was walkin home with my girlfriend at the time, mistook myself for being high after being hynotized by how beautiful the moon looked, came to an epiphany i will not share to save time on the response/story, and found myself feeling my tank top, (the bottom most layer of clothing i had on of 4 shirts), melding together with my chest, in my higher consciousness state i went with it until i felt that it was too intense, snapped out of the trance and after a few steps found that my tank top had fallen to the ground behind me, i later confronted my girlfriend on the situation and she expressed to me that i had been sounding distant while speaking with her like i had been in a "far off tunnel" as well as that she had looked up at me to only see my clothes walking, nothing else, then she blinked and i was back. i found out through the most obscure materials of psychic sights and looking for this skill what i had done that night was called "phasing", not much known on it, not too many reporters of such skill, not too many youtube videos on how to develop your Phasing skills.
now i believe that if i could Phase, something that most would scoff at as the scholarly people of science that usually are on these sights, (why a scientist would be on a Metaphysical, Occult, Magick, & Psychic site i have no idea) would say is not physically possible and thus this is a hoax or a troll; if i could phase then Teleportation is possible as well as levitation, light speed travel to distant planets far off where life and other energies/entities may be, phase shifting to higher planes of existence, etc. is possible too
i say all this to say, if your sister can teleport that is something that isn't common in todays world, i believe anyone CAN do it but few ALLOW themselves to and thus it is beautiful that your sister can do it and has done it, and i encourage the persuit of at least trying to figure out if she can do it again, (if you can do anything once you can do it again), if not for the skill itself then for one other self mastery technique that she can have under her belt to better live and not be asleep in a life as beautiful as this one.
i have not been able as of yet to replicate my experience due to fears, phobias and basically chickening out at the last second, but when i do again i will take it for all it is worth and hope that if your sister can do it again she would do the same.
hope this has been of some help, peace and blessings