Spouses turned into siblings?? Help??

Hi there, need some help with a current save file.

For some reason, two married sims that have been together for a long time have suddenly become related as sisters and thus can't do any kind of romantic/ partner gestures, before this they were already stuck at "Acquaintances" which was bearable but now they're blood related for no reason whatsoever.

I do not use any CC, mods or any other additional content, I noticed this as an issue only after I used cas.fulleditmode to edit some things I wasn't a fan of (The brain muscle trait from growing together turned one of them into the hulk when she never works out) but I never used it to edit anything about their relationship status.

Is there anything anyone can do to help? Additionally, i'd like them to be soulmates again and not just acquaintances, but mostly I don't want these two married people to be related.