Hheh...yes, quite the interesting relationship. I highly doubt he's a pedo though, and certainly not intentionally by the writers.
Can you imagine if they somehow ever implied that Negan is a pedo?! I mean, as of now he's only beaten two guys to death in one of the most violent scenes I've ever seen on television, but a pedophile!? Kill him immediately!
But yeah, as the season progresses, Callie Flemming continues to be as adorable as ever :)
There is an endearing and cute theme though in the show, of the heart of a young girl being capable of seeing goodness in the worst of monsters, and forming a frienship or bond with him, which I think in a way does speak to the wonderful and amazing spirit of the female child.