I would start researching tragic home fires in that area around this time of year. Go as far back as you can. Sure, maybe this is demonic in nature, but maybe it's also a sad tragedy. Perhaps the mother was desperate to save her children from a life of pain and poverty and starving to death, maybe she went insane, maybe it was truly an accident because Daniel wasn't there to help. Either way, if these are human spirits, maybe they just need to be properly acknowledged, forgiven, and laid to rest. The woman seems to be suffering, reliving the same tragedy every year. Perhaps if you could find out who she and the children were you could go back out there with a priest to help lay their souls to rest.