I think both she and Kylo are Anakin's grandchildren by different parents, with Rey being Luke's daughter that he placed into hiding to keep her safe from harm at the hands of her cousin Ben.
If Ben Solo was as consumed by the Dark Side as the film leads us to believe and he could murder his own father then I have few doubts he'd have hurt or killed Rey if she is indeed Luke's daughter and he could have found a way to get to her. As somebody Luke loves she would have been an easy target.
If Ben Solo was as consumed by the Dark Side as the film leads us to believe and he could murder his own father then I have few doubts he'd have hurt or killed Rey if she is indeed Luke's daughter and he could have found a way to get to her. As somebody Luke loves she would have been an easy target.