On the other hand I'm pretty sure there was slash for Anakin and Obi-wan back around 2004. Those writers could have their love grandbaby...just after a fashion (and with some functional genetics this time)
Yes. I'm sure that 2004 is when that flavour of slash started and abruptly stopped.
Shmi spent how long ####ing Owen's dad?
Cliegg Larrs.
"Hey! Look there's a 50 year old slave more valuable to "its" owner than a sweet Star Ship, so I think I'll buy her, and free her and marry her, because once she's free, she'll still want to be with me, even though she has to do everything I say right up to the point that I free her, because I know that she loves me as much as I love her her."
(Anyone thinking of Ex Machina a little? Or that it's ironic that someone in a wheelchair would marry a woman called Skywalker?)
What exactly did Shmi do for Watto, that random dudes are handing out thousands and thousands of credits to run away with her to temple and tie the knot?
Yup.
More Tatooinian prostitutes.
"No pod is worth two slaves!"
Yeah, light dusting, and cooking a few meals. Sure.
If Cleigg and Shmi were doing it for years before he'd stowed away enough dough to emancipate the little lady, it's possible there could have been a John Snow situation going on that his first wife might have raised Shmi and Cliegg's kid?
(Owen was probably not a Skywalker.)
"Honey if you keep spending all your cash to bang me, you'll never have enough enough cabbage to buy me off that flying rat, and you know that's what I really want, I really want to be with you. Just you."
There was over ten years between Phantom Menace and Attack of the Clones. Shmi could have had another kid in the interim, and the actress (Pernilla August. Oh look, she did an episode of Clone wars in 2011 as Shmi. Good for her!) was 41 in Phantom Menace so if Shmi was about the same, she could have easily had more children before Anikan, that she never talked about.
Luke might have a blood related Uncle there without included made up crap not supported by canon, who is leaving baby mommas all over the galaxy.