I don’t like how they sold her to protect her, it’s honesty much better if they just sold her fro the drinking money, maybe palpatines son was discarded and disgraced by everyone because he is the son of the emperor, he turns into a drunk and sells her, kylo Ren can say that in the scene on the ship by getting his line from the last Jedi “I didn’t lie to you, your parents sold you for drinking money”. Works in every aspect and it even makes his lines towards the end of the movie better, and I cheesy “my parents were strong” it would be more effective that everyone in her family was a bad person
Or, maybe Rey’s father was discarded and disgraced by Palpatine himself. That’s pretty much what happened in Canon anyway (https://starwars.fandom.com/wiki/Rey’s_father#cite_note-TROS_EE-0 second paragraph) but having Rey’s father turn out a bad person as well would indicate a vicious cycle of abuse to mirror the vicious cycle of Sith succession. In fact… that would probably be enough to justify waiting until the third movie to tell her about it.
Have Kylo say something like “Your father threw you away like trash, as did his father… Emperor Palpatine.”