In The Force Awakens…
Rey is drawn to Luke Skywalker’s lightsaber, which gives her an intense series of visions. She sees Luke being betrayed by Han’s son, causing Luke to leave. She then immediately sees herself as a little girl screaming for her father not to leave her.
This pretty clearly tells us that …
Luke is her father. Especially since the movie ends with her reuniting with him.
So who is Rey’s mother?
Is there anything in the other movies or books about the identity of