Can you die from a 'broken heart?'?

Sadly, a friend of mine recently had a pretty shitty day.

He and his girlfriend for many years, were hiking with their two dogs (one 8mos old, the other around 9 yrs) when the youngest dog suddenly collapsed. It died soon after of heat stroke…
(Where we live it’s very hot and humid.Heatstroke is sadly a common cause of death for not just animals other than human. )
This couple could easily be called ‘dog parents’ as they had no children ,but they LOVED their dogs. Especially the puppy who died.
My friend’s girlfriend was found dead, that same night. Cause of death was heart attack….(Yes , this guy’s ‘son’ and ‘wife’ both passed in the same 9 hrs….

The opinion of my friends and I is that the dog’s death hurt her so bad she died…

I’ve felt heart ache before , like just being ‘heartbroken,’ and it was catastrophic. (Can’t imagine how my friend makes it now…)She was in her early 30’s when she died.
I know of many old couples , that when one of them died, the other soon died, without changes (at least known ) to their health. When my grandfather died, my grandmother slowly eroded away and died…

Anyone have a story where something similar happened?

Can you die from a stressful event?