This wasn't a Luton charter flight bringing beerheads back from Alicante. Do I understand these were full fares and a First Class EK cabin? How many airlines call the Police on their full fare First Class passengers (leaving aside the famous United(?) FC defecation incident!)? Rod Stewart and his entourage in their wild days destroyed a BA FC cabin on an LAX flight. Like it or not, the rules are different there.
I'm still looking for a victim in this. Was the lady a 'victim'? Is she complaining? Maybe she has her own reasons for staying in that relationship- stretching the time out for a good settlement out of the brute maybe. But she appears to have not required any help or made any request for assistance. It's her business, not nosy bystanders itching to step in and give the bounder a bloody nose. She sets the pace, and she did not want help, and I respect the crew- they took their lead from her.