Littlefinger never saw Catelyn Stark between the time her dad kicked him out of Riverrun for fighting a duel over her until she came to King’s Landing in the first book/season 1 of the show. Sansa looks like young Cat and he wants to bang her, that’s why he’s hovering. ;d
In any case, Jon is only Sansa and Arya’s cousin and cousin marriage is perfectly cool (still cool in some places in the real world and legal in several US states), not considered incest, Tywin Lannister was married to his first cousin.
In George RR Martin’s first draft of the story, Arya was in love with Jon (and Tyrion in love with her LOL)!
As to Dany, I wouldn’t assume she’s actually infertile just because that witch told her so. In her last book chapter it seems like she might be having a miscarriage after eating some wild berries that made her sick.
Thanks for that.
Impy: "In any case, Jon is only Sansa and Arya’s cousin and cousin marriage is perfectly cool..."
Maybe in real-life, but in fiction I'd think not so much, especially as part of a happy ending.
So let me suggest something else to you: why did Cateyln Stark happily put up with supposedly her husband's bastard son (Jon "Snow") at Winterfell?
Might it not be that Ned Stark knew a secret or two about her too?
Might not the deal be: you accept mine, I'll accept yours?
Another thought, since these fantasies seem to borrow liberally from each other, might sneaky Littlefinger be less sinister and more "Snape-like" than it now seems?
Anyway, thanks for your comments, much appreciated.