The Realistic Reactions Mod for The Sims 4 is designed to overhaul how sims react to situations in the game. Currently, there are three categories included in this mod:
1. Cheating Overhaul
2. Overhaul to how Sims react when seeing family members fighting with one another
3. Sims reacting to teen pregnancy (if mods are installed to allow teens to get pregnant)
Your Sims will automatically wear formal wear at wedding and pre wedding partys. For family gathering, there's also an alternate version available where they'll choose party wear. Bach parties remain untouched as they are already set to the appropriate party wear.