The human condition ( both sexes but different for each ) creates these sorts of problems as the men women desire genetically ( call it tingle generating if you like ) are also the men they cannot live with in the long term.
The great whilte hunter/protector is often not so great at domesticity in the long term for a variety of reasons.
Some very smart women instinctively know this and cheat knowingly, others cheat instinctively but don't fully appreciate why. The Burt Lancaster movie The Rainmaker ( and yes you can google it and watch it ) highlights this very well. Burts character is desired by the spinster but unusually knows he wont handle sticking around and tells her so when asked. She still wants him though all the same genetically. Another men, no hunter/protector and boring as but dependable and will stick around is orbiting the spinster. Being a film of decades ago the movie leaves us to guess she sleeps with Burt and gets pregnant to Burt but ends up marrying the beta male to raise Burts child.
Not relevant o today you think. Think again as around 30% of contested paternity tests the husband is not the father to this day. How much DV arises from just this human condition that isn't go away anytime soon.
It's not the whole picture of course but a big part of it and it plays put in other ways too such as a partner not happy about being denied access to children and spite from either sex's bad eggs. For many access to kids or progeny is life and death stuff.
The film tells the story of a middle-aged woman, suffering from unrequited love for the local town sheriff; however, she falls for a con man who comes to town ...
