I suspect the "alpine divorce" phenomenon is the same desire to test influence dangerously attempted in a higher stakes environment. "No, let's go to this restaurant" becomes "Let's take this path" or "Let's take a break" and refusal to entertain tests of influence to alter the plan are recast as attempted murder.
A certain flavour of “shit testing”
https://www.urbandictionary.com/define.php?term=shit%20test&...
It’s easy to criticise Sara, but Sara had a man with her who should have acted like a man.