Can a Married Sim Propose to Another Sim in The Sims 2? Cheats & Alternatives

No direct cheat exists to force a married Sim to propose to someone else. The game treats marriage as a committed, exclusive state.

How to Achieve the Narrative (with testingcheatsenabled true)

1. Divorce First: Shift-click spouse > Make Unhappy repeatedly > they'll eventually want a divorce. Once single, they can propose freely.
2. Relationship Manipulation: Shift-click target Sim > Make Furious / Make Enemy with spouse. Shift-click your Sim > Make Friend / Make Romantic Interest with target. Let autonomy handle the rest.
3. Storytelling Approach: Use SimPE (external save editor) to delete the marriage token, then play out the breakup and new romance organically.

Warning: Cheats can corrupt saves. Always backup your neighborhood folder (Documents/EA Games/The Sims 2/Neighborhoods) before using testingcheatsenabled or SimPE.