The only thing I've changed to my mods recently was adding a few new CAS sliders and changing the version of XCAS I had installed after realizing I was using XCAS 1.69 instead of 1.67.

I have also tried removing my non-nraas mods, deleting cache files, and restarting but that didn't work either. I have tried resets on both sims, resetting my entire lot, and resetting all objects with no success. I have double checked the versions on all my nraas mods. Sent the two affected sims (the married couple) back to the future but they were still unable to interact with each other. As soon as SV loaded up I saw a CleanupRelationships error notification and saw a couple other ScriptError files in my folder (see below). Ended up keeping 2 plumbots and sent my household of 4 back to the present. Each of my sims probably created and sold a dozen or so bots (mentioning all this in case it's relevant to the presumed relationship issue). Sent my two sims to the future and spent a week or two in utopia leveling up skills and building and selling plumbots. Initially I sent my sim to the future and spent probably 4-5 sim weeks there, met and befriended almost everyone in town, came back and triggered the dystopia future, spent a couple days there then went back to trigger utopia and then got married to trigger the change in descendants. Both of them can interact with other sims in the household and in town but not with each other. By that I mean clicking on the other sim doesn't do anything and the normal menu won't pop up.

Then I realized my two sims could not interact with each other anymore. Everything was fine through many hours of gameplay and several in-game weeks. So I started playing a new game recently with mods installed (mostly nraas mods with a few others).

The sims 3 plumbot penis mods