Blimey! I was in a very similar position last year. My car broke down on a blind bend just after a motorway slip road.
Drivers came speeding off the motorway onto the slip road, so it was a terribly dangerous place to break down.
I was terrified someone would smash into the back of me at speed. I put my hazzarss on, got straight out the car to a safe place and immediately phoned the police, then phoned the RAC.
A kind gentleman stopped to help me almost immediately. I told him I'd broken down and that I'd phoned the police and breakdown. He reversed and out in his hazards too.
The police arrived within 10 minutes and did what your husband (and the gentleman did), reversed and put their hazards and blue lights on, as well as putting some cones done between them and my broken down car.
So am absolutely gob smacked that the woman complained.
I was utterly overwhelmed by the kindness of the man. I couldn't thank him enough. It was a terrifying situation. The police thanked him too and sent him in his way.
What did the police actually say when they came round?