people connect the weird route to whatever could have happened to dess because of the stab sound when re-equiping the thornring and during asgore's vagueposting, but, the sound doesn't play in relation to dess, it plays for asgore's notes/evidence. I think the sound effect is meant to show that the more he tries to solve the case and find the truth of dark worlds, the more he twists the knife in his own psyche & his marriage. something terrible happened to dess, obviously, but I doubt it was weirrrdddddd like that