Some time ago I had a mod that prevented betrayal accusations, but now I don't have it, maybe I deleted it because it was ineffective. And I forgot about it exactly as long as the problem is not reminded of itself. Now I'd like to try changing some settings manually using Returner. I know it's possible, so I'd be happy if someone helped me to find the necessary strings. Some quarrels aren't in my plans, especially when they arise in such an absurd way. How will the characters know about this? I'm pretty sure, there are no direct or indirect witnesses to this, unless it could involve under-beds monsters. I don't mind that sims will know about the infidelity of their beloveds, but let it be fair and more realistic.
I checked out all what's responsible for the romantic relationship backwards and forwards. I guess I'm too inattentive, because there are a lot of factors that increase and decrease the chances of accusations, but I didn't find a base value. I'd prefer to reduce everything to zero or make a very small chance for this.