@blacksaber79 Thanks for the sentiment, I appreciate it.
@sheepdoge Under some other circumstances I might say maybe it is, but when you take into account the fact Cecilia herself, despite nominally being the demon lord of lust, seems to be just as innocent as Karna, it's kind of impossible to view it as grooming. Even disregarding Cecilia being from a different species, one crucial thing would be that nothing suggests Karna's age would matter to her at all. Maybe I'm wrong, but I'm under an impression Karna is the first member of the opposite sex she has ever been close to or could trust enough to speak of things like that. Karna being equally innocent should make it easier for her. After all, he's not visibly lusting after her, which would make her feel at ease. Let's not forget Karna is probably the stronger one of those two, or at the very least if he wanted to escape, there's nothing she could do to stop him. So, Karna is not vulnerable at all aside from emotional damage. But even that he has already experienced in his life.
Or maybe she's just a damn good actor, and is, in fact, an experienced seducer and man-eater. However, this series seems too fluffy for such a gruesome twist.