You could have a swinger-style marriage, where A and B are married to both C and D (but A is not married to B, nor C to D), or a plural marriage in which everyone You can obviously set up any combination of multiple marriages this way. Repeat this process for Sims B and C, and you'll have A, B and C all appearing as D's husbands or wives. (7) In the next window, select SetRelationship. (6) A window with various options appears select Relationship. (2) Click on Sim D while keeping A active. C and D, and you want A, B and C to be married to D but not to each other (polygynous and polyandrous marriages are like that).
You install the DebugEnabler package in your Mods folder in the usual way (make sure you've got the right version for your game): You can trick the game into letting your Sim be married to more than one spouse at the same time. Make sure to back up your game before trying any of the following suggestions.
The chances of it to fail rely on Wicked Whims attractiveness system and simler90 Better Romance re-tuning of the scoring for the outcome of social romances (it includes nothing from the mod but calls some testsets from it) so it may need both these mods (or Wonderful Whims and Better Romance) to work correctly. The interaction added by this mod can fail and can be refused.
The interaction added by this mod cannot fail, and cannot be refused. The interactions will still trigger jealousy. This should include woohoo if you have no strings woohoo enabled. they can random flirt as much as they want, unless you use the interaction (under romance) " express interest in a romantic relationship" the romance bar will not go up, ever. Basically, I decided that it's not the random flirt that pissess me off, but the fact that they build a romance bar with random people.