Yes, I have already been using romancemod, but it's mainly the Family sims I have trouble with.  Sims with other aspirations still get upset when a sim they're in love with woohoos another sim while they're on the lot, but at least it doesn't cause them to become furious and torpedo their relationship.  I guess I'll just have to make sure none of the sims from the latest generations have the Family aspiration.  Then at least I won't have to watch over non-playables like a hawk, to keep them from destroying marriages.

I just don't understand why EAxis would make an aspiration for Family, and then NOT have such sims be able to autonomously refuse romantic interactions from other sims that are not their spouse.

Yes, necromancy is bad, mmkay.  Unfortunately, after several hours of searching, all I can find is the exact opposite of what I'm looking for.  I suppose that's one of the problems of still playing The Sims 2 in 2020.

Does anyone know if there is a mod/hack/whatever that prevents sims from autonomously flirting/accepting flirts?  I am so sick of going to a community lot and having my married sims "admire" or "Be admired" just as their spouse walks onto the lot.  Even worse is when happily married *Family* sims let some random townie or playable flirt with them while their spouse is on the lot.  I've had to disable visitors on my residential lots, and watch like a hawk on community lots so I can make everybody selectable as they arrive and set them to "Macro/Dig for Stuff." (Power Idling doesn't seem to stop them from interacting, sometimes)

At least as bad is Uni lots where the stupid cow mascots run into the house before I can stop them and start flirting with my sims.  While it's amusing sometimes to take control of said mascot and make them sit in the snow in their underwear while they go into aspiration failure, I just want a little sanity in my game -- and everybody being horndogs all the time is NOT sane.

BTDubs, I do not have ACR.  I've been R'ingTFM, and the only autonomous behaviors that can be turned off are the ones ACR itself initiates.