I doubt there is a single word. But "feminine" does not necessarily "connote" "overtly sexual in a female way" any more than "masculine" connotes "overtly sexual in a male way." Instead, the words "feminine" and "masculine" relate to all kinds of behavior that is considered typical of one sex or the other. (The loss of the distinction between the meanings of "sex" and "gender" has made discussion of such issues far more complicated than it need be.)
She was being overtly feminine
She was being excessively feminine
may be considered sexist , but they describe negatively a blatant exhibition of behavior that is considered either socially or biologically feminine. And they can be used to describe men (although usually without qualification because the mere exhibition of the behavior beyond the most trivial is considered noteworthy).
He was being feminine in his response
would typically be interpreted as at least somewhat pejorative. Were you to say
He was being excessively feminine
that would be sort of a double disparagement, one against a behavior that is not considered typically masculine and therefore "strong," and one against a man who deviates excessively from what is socially deemed masculine.
So trying to answer your question without generating a lot of irrelevant argument, I think that the word you want is "feminine," understanding that a whole load of social judgments may be associated with that word. I further think that some phrase or adverb indicating degree or purpose or effect is needed to get across the exact sense you want to convey. The word "feminine" itself does not have negative connotations, but it is easy to generate negative connotations by coupling it with other words such as "wiles."
She bemused the men with her overt femininity
manages to disparage both the woman and the men simultaneously.