As much as I agree, I don't think a hunky himbo would work plot-wise for his reincarnation since the heart of the dragon counsel or whatever they're called kept sending hunky himbos who resembled him.
This story basically telling us that human can be more sinister than demon. Its the cliche where demon is "kinder" than human. "Kinder" as in, more straightforward and not masking themselves out.
is the child is her brothers?
Yes