Re: make poly relationships

Hi,

You would need the player trait on all the sims in the relationship.

Player is obtained upon reaching Level 4 of the Serial Romantic aspiration. Sims with this trait will never cause another Sim to get jealous of their actions, such as using a Romantic-type interaction on a different Sim in front of their spouse. Note that Sims with the Player trait can themselves still feel jealousy (unless the Sim who would make them jealous also has the Player trait).

That's for the flirting part. If you want them to be dating you would need to add mods, as the base game doesn't allow polygamy.

Mods can add multiple boyfriends/girlfriends and even marriages.

Love is free.