On Finland and vanishing bodies

So I noticed that a lot of people, when talking about the woman who murdered her husband in Finland, assume that she killed him and that his body disappeared and another husband materialized there so that her story seemed crazy to the police the next day. Whereas while watching the movie, I understood it as the woman killing her husband, then probably leaving her house, walking through a dark zone caused by that comet and then ending up in another house where her husband was still alive. Maybe she discovered him right away, or maybe she fell asleep and woke up to her 'dead' husband being right there with her. But the point is, a lot of people use the Finland example as proof that dead bodies vanish after the comet passes when explaining the ending of the movie with Bathtub Emily's disappearance, while I think there's a good chance Finland isn't proof of this at all. Not saying it's absolutely impossible that they vanish, just saying I'm not sure what happened in Finland is necessarily evidence that they do. Any thoughts?