Hentai artists predominantly exploit Yor as a naive housewife, ready for all the housewife-porn tropes.
However, I would rather explore the concept of a split personality - for instance, the idea that when her assassin persona, the Thorn Princess, engages in sexual activity, it ‘doesn’t count’.
To be frank, I’m fond of these funny hentai logic tropes: anal not counting as incest, protected sex excused as non-cheating, and so forth.
And given the premise of Spy x Family, this brand of NTR narrative tension feels quite organic. From the show's comedic logic to full-blown hentai logic - it's basically just a hop, skip, and a jump away.
P.S. By the way, I liked this ending of Dead or Alive 4 way before Spy x Family.
P.P.S.
That's why Spy x Family is a fine sisntr, don't you think?
And Fiona is like Aya in
A Promise Best Left Unkept