Yeah, considering everything he was responsible for with Bajor in particular, plus the fact that there was that one officer who spoke about Dukat’s seduction of Kira’s mother in a way that said it was habit... Frankly, I’m more surprised that Dukat didn’t have more bastard children out there. And the “comfort women” were, by definition, there under duress and not in a position to consent.
So him keeping a personal sex slave? Particularly of someone who had already been surgically altered to look like Kira, who he had a canonical interest in for years? Yeah, I can so easily see that, in my mind, Fearful Symmetry only made that text, rather than just letting it be subtext or implied.