I haven't noticed that. I do know that female authors 'tend' to do more relationship stuff than male authors, or at least go in way deeper on it than that guys would/do and that they 'rarely' do so without a smorgass board of potential relationships thrown into the blender. Then the book ooh's and ahh's as we watch to find out which color that blenderized smorgass board eventually settles down into.
As for violence in relationships.... hmm. I mean I have noticed that there are a lot of books where the MC's just can't seen to stop themselves from hanging around with 'dangerous' side characters that are destined to treat them poorly if they, as they inevitably do, get too close to the MC. Times where I'm talking to the screen saying, 'just say no' and 'walk away now please' but they inevitably don't.
I mean if I'm looking at it from a 'male' character or my own personal viewpoint and I have this hot *itch of a vampire that is twice as strong as I am, has political power, and is just itching to sink her fangs into me, in multiple meanings of the phrase, then I'm out of there. Maybe I hang in there for 'one' book to free my family but after that we're off like buckshot, out of the country out to the tropics where the sun shines more than anywhere else if necessary. No blood bondage for me, thanks but no thanks. But for the girl characters there seems to be this irresistable attraction to hot dangerous and fangy.
You know you want to play with fire, I'm not going to be as upset about the weeping and sobbing that eventually results as I am from some random person dragged off the street. For the latter I'll go to war. For the former? I guess I'll file a court case and move out of the danger zone. It follows her home that's another issue. But you know what I don't have any interest in it as a reader or a potential MC.
The Deposed King