Nice chapter, tough the flashback did feel a little rushed. It just could have been little longer so that it could carry more emotional impact. Not that it was terrible tough; I loved how jealous toy soldier was about the love letter boy! 
Also it's a little thing, but I like how much darker tone Oda has taken in his story, enough to actually show dead bodies on-screen. I don't think he has done that after Ace and Whitebeard (and even he was little shadowed).
Doflamingo's clearly somehow responsible for tarnishing Riku's reputation (btw that's a nickname here in Finland; gonna take some to get used to :pouty:), but honestly I would find it more interesting if he actually was a horrible tyrant, since it would make Doffy less of a "cardboard villain beyond everything that's wrong in this kingdom" and the whole situation more complicated when Rebecca and SH's try to ursup him! Of course she's gonna beloved by her subjects in the end but still!
Oh well, maybe Oda takes the longer route for once. 
That little girl being Doffy's daughter might be more likely after all. If he needed to ensure his throne and support, he probably had to make sure he would have a potential successor a.k.a. a kid. But the question is that who is the mother? Jora? :ninja: Just kidding!
Also having a relationship with a toy = definitely kinky! I know that sex isn't all there is in partnership, but there still needs to be sexual tension! Otherwise we would fall in love with anyone and not just the genders we are sexually attracted to!