OK maybe I should finish the story.
The beginning is as above. The family lived in an inn located between two cities atop a mountain. When the wife sickened and died, the husband had to leave her body alive to climb down the mountain and fetch the chevra kadisha.
When they returned, she opened the door and asked where her husband had been. He was completely weirded out and asked the CK members to sleep over. The next day they said they need to tend to dead people, not live ones, so they left.
Years passed and the couple had kids.
One day the BST stopped at the inn with his talmidim. They made a Minyan to daven mincha but as soon as they started davening, a huge storm started and shook the house. The students were thrown to the ground.
As soon as the BST finished davening, the storm ceased. It had been so strong that the mountain had split in half. The wife and kids were dead on the floor. That’s when the BST explained that his wife’s body had been taken over by forces of tumah and they had used her body to birth children who were also forces of tumah.
The BST with his mincha accomplished that they should leave and never mix with humans again.
If I’m not mistaken, they were taken over by shedim. But I could be wrong.
It is notable to mention that in r’ yoel Baal Shem times the is a documented story of shedim taking over the apartment is an dead couple and scaring the wits out of the other tenants.
Nowadays we don’t hear such stories anymore.
Dybuk stories are less common as well although Rabbi kaplan from Toronto had an experience with excorcising one it seems