you guys like your sith to sparkle in sunlight and be romantic lovers, i prefer mine to be evil, ruthless and beyond such petty things as sex. The ability to bust a nut is insignificant next to the power of the force.
https://www.cbr.com/star-wars-rise-of-skywalker-rey-father-clone-palpatine/
"Whether that was a strong narrative choice is beside the point. The very existence of Rey Palpatine implies something even more disturbing than the potential of a Dark Rey: that Grandpa Sheev engaged in intercourse with a human woman."
"What's worse, if one does the math, is that this off-screen rendezvous likely occurred just after the events of Revenge of the Sith ... after Palp's reflected Force lightning disfigured his face into the wrinkly gray mess that came to be better known as Darth Sidious. Star Wars fans are always hungry for more galactic world-building, and are even pretty tolerant of romance plots, but this was a development nobody asked for."
"The film version of The Rise of Skywalker gives us scant but conclusive information about Rey's biological family tree. In addition to the big reveal, we also see her parents but for a few seconds in flashback, played by actors Billy Howle and Jodie Comer. The film changes their motivation for having abandoned her on Jakku, from drunken gambling to an attempt to protect her from a grandfather who sought to exploit her power. The thematic consequence here has more to do with the idea that Rey isn't destined to fall to the dark side, simply because of her genetics. Though we do see what appear to be Snoke clones in a pretty generic vat of science-liquid, and Palpatine alludes to being not entirely human, the concept of cloning isn't explored in any real way on screen."
"The Rise of Skywalker: Expanded Edition. There, we learn the Palpatine who's been lurking on Exegol for all of these years is actually a clone. That twist isn't much of a stretch for audiences, as the already-geriatric Emperor plummeted to what was probably a pretty gruesome end as Death Star II exploded. More surprising is the revelation that Palpatine's son was the result of a failed experimentation with cloning, and not traditional human reproduction.. We can all relax. It turns out, Palpatine wasn't spending the downtime getting busy."
""One genetic strandcast lived," the leaked passage reads, referencing a term first used on The Mandalorian. "Thrived, even. A not-quite-identical clone. His 'son.' But he was a useless, powerless failure. Palpatine could not even bear to look upon such disappointing ordinariness. [...] The boy's only worth would lay in continuing the bloodline through more natural methods."
The notion of Palpatine creating life the old-fashioned way never made much sense. He didn't have a tragic love interest, as did his mentor, Darth Plagueis, or his apprentice, Darth Vader. And actor Ian McDiarmid always portrayed the character as being hornier for power than for human companionship. But the clarification makes you wonder what the members of the Lucasfilm Story Group knew, and when they knew it. How much is revisionist history? The scene in The Last Jedi in which Rey longs to see her parents but instead sees an endless reflection of herself, for example, could've meant much more had these new plot points been woven into the overarching story of the sequel trilogy -- earlier and with more purpose."