So Rey and Kylo’s enteries in the Star Wars database was recently updated to include the fact that a bond had formed between the two. This partially explains why she was able to get into his head.
This is one of the most exciting aspects of episode 8 to come.
I have a feeling they won’t explore it much. Unless it’s a Kreia like bond (when one dies the other dies as well) I think they’ll keep it vague as to what their connection actually is.
I just hope this doesn’t mean Reylo is a thing…