Stockholm Syndrome continuum should definitely be a thing.

And yeah, Flavia's kind of a borderline case. She seems pretty sure that her husband isn't going to beat her for losing the bride present he gave her. (Of course, she's trying to chivvy Aquila out of the settlement just then, so even if she wasn't sure she'd say that she'd be fine. No good activating his protective brotherly instincts.)

Also, in classic, captive/hostage situation Stockholm syndrome, I don't think it's necessary for the captor to be cruel beyond the inherent cruelty of keeping someone prisoner. Falling for a captor who is nice, aside from the whole taking-you-captive thing, still counts as Stockholm syndrome, I think.

It's just that absent literal captive-taking, Stockholm-syndrome-like situations generally do involve one party being at least borderline abusive.