I’m not sure how we could even navigate the scene between her and Finn without mentioning what Palps did to her parents. The concern I personally have with not mentioning Anakin’s part in all this is that we make a direct comparison between the two at the beginning. Even without that there, most people will assume Palpatine created Anakin, too, purely based off of the similarities in their births and unconfirmed nature of this topic in the films themselves. Which creates concerning incest vibes regardless. So the way I see it, there really is no middle ground here. Either: 1. Anakin was created by the light, manipulated to the dark, redeemed, and all his descendants proceeded to give in to their unusually dark nature, or 2. Anakin always had a conflicted mind (perhaps 50% dark, 50% light - balanced), was redeemed, but his descendants still needed to fight their own inner conflict:
“I pushed you in the desert because I needed to see it… I needed you to see it… who you are. Your nature is the dark side, Rey…”
“You’re lying.”
“I’d never lie to you… your parents were no one. Junk traders expecting a child they never planned for.”
“Don’t!”
“Your father had no part in your conception.”
“I don’t want this!”
“…just like Vader.”
“No!”
“You see it, too, don’t you? The throne.”
(Rey sees a flash of the vision of herself on the Sith throne)
“Your parents feared you. The same way Luke feared me.”
“Stop talking.”
“But they never knew you like I do.”
(Cutaway to heroes capture)
“Your parents were always drunk, especially so when they sold you. Palpatine’s followers had your parents taken. He was looking for you, but they couldn’t even remember what happened to you. They died to ensure you never saw a second chance at love."
(Brief shots of Ochi brandishing his blade - not their deaths because it shows them as too sympathetic)
“No!”
(The mask of Vader falls to the ground)
“So that’s where you are.”
“Before your Jedi path, Palpatine wanted you alive. I’ll come tell you why.”
“Rey… I know the rest of our story.”
“Tell me.”
“The Emperor manipulated the Force itself into creating life. My grandfather proved too balanced. So he gave you his own nature. You… are a Palpatine.”
"The Emperor wants us to fight each other so his strongest heir may claim the throne. He hasn’t realized the depth of our connection, Rey… a bond, not of blood, but shared power in the Force. We’ll kill him, and finish what Vader started, together…”
(This way he’s not giving Rey a vocab lesson in the middle of his proposal. We’ll save that for Palpatine to define since he’s known to do that sort of thing. We have to refer to “the Force” instead of the “dark side” because the midichlorians don’t pick sides of the Force.)