I can’t imagine Rey’s dad believing his girl saying she got pregnant for no reason. The lines about Palpatine using the force’s reaction to his resurrection is sort of hard to grasp because it’s not really tangible, at least for me. I think it’s better to just leave it vague.
This. What Kylo is telling Rey is for her own and the audience’s better understanding. Whether we have Kylo phrase it in this scene as neither parent having involvement in her creation or no father having involvement in her creation, the reality of the situation will always appear exactly as what you just described - that her partner wouldn’t believe her and think she cheated on him. Which would only add to her own resentment of the child. And the father would rightly believe she isn’t his own anyway. So both of them are eventually down with selling her. It makes sense. Perhaps we should steer away from their fear of her and back to the land of resentment. Because ultimately the audience’s own understanding of this more abstract origin story is more important than a slightly elevated characterization for Rey. We desperately need that link to Shmi’s line: “There was no father” to ensure this concept doesn’t feel un-Star Warsy.
EDIT: Here is a draft of the above:
“I’d never lie to you. Your parents were no one. Junk traders expecting a child they couldn’t have conceived.”
“Don’t!”
“Resentment grew. He never believed her — no father, yet you were born.”
“I don’t want this!”
“…just like Vader.”
“No!”
I’ll have to give the Palpatine resurrection lines more thought tomorrow. They might not make it through. We’ll probably have to revert to something like “Luke saw the same fate in me. But you and I don’t want it” and “Why? I know you better than anyone else”. But this is where they currently stand for me:
“When Palpatine was summoned, it caused a great disturbance in the Force.”
“Stop talking.”
“Its response was his greatest opportunity.”