Same-sex spouses are now siblings

I’m absolutely devastated as my play-through of my real-life has been absolutely derailed, as now my spouse and I have somehow turned into “sisters”. I just can’t believe that this is happening in 2025 and isn’t being updated in the 150+ bug patch. I read on the forums that it’s been happening for at least three years, regardless of mods (I even just saw one from 5 years ago) 🙃

Does anyone know how to actually fix it? I tried cas.fulleditmode and it didn’t work (with/without mods). I tried MCCC, and UI cheats to delete the “sisters” relationship and add the “spouse” one. Both of our sims were happy because they were “newly married” and I thought “yay, back to normal”. Oh boy, I was wrong. Still can’t do any romantic interactions besides offering massages. I’m actually so sad about this, as it’s been my favorite save since I started it over a year ago as it’s my partner and I. I also have our best friends and cats in the save. 

All I want is to be romantic with my spouse (and hopefully have a science baby again one day)😢 since it’s my partner and I’s life but in the sims, I’m so so sad. I truly can’t believe this has happened, and nothing I’ve tried has worked to allow us to be romantic again. Please please help! I solely play as lesbian sims so this is so frustrating and actually game-breaking for me.

(I also read the only way to fix it is by adding **bleep** and allowing romance between siblings (ICK!). Literally so disgusting that this is the only option that might work)