had a realization. remember in tma s5 when jon talks about how it would've been nice for he and martin to have been together without the entities, and martin basically says "but we wouldn't have gotten together because without the entities we never would've bonded the way we did"??
well. sam and celia are the opposite of that. if they were just normal coworkers in a boring normal job they could've had a regular normal relationship from the start ("I really did like you") except because of the Horrors that possibility was precluded.
the existence of the eldritch horrors are what caused jon and martin's relationship to develop, and the existence of the eldritch horrors are also what caused sam and celia's relationship to be doomed to fall apart.

















