We don’t know the details of the discussion but we can say one or both parties didn’t know what they were doing:
Police said Fleming was in a dispute with her 55-year-old boyfriend after discovering that he had brought his loaded 12 gauge shotgun into their shared home. They were discussing gun safety, including the proper handling of a loaded firearm.
It’s unclear the other details of the argument, but police said Fleming at one point intentionally opened fire from a close range from an upstairs room and blew out a hole about the size of a softball.
Instead of arguing they should have just taken an NRA gun safety class together.