In the game’s main options menu, go into “Game Options”, then look under “Options” for the option to toggle aging on or off no cheat codes needed or if you have the generations expansion pack your sims can make an young again potion or buy a young again potion or buy a never age reward with the happy points
edit typo
wait just thought of something else too you can try this too
ctrl+shift+c hold all 3 together in the menu bar that appears at the top of the screen type in testingcheatsenabled true hit enter then shift clik on the sim edit in CAS then age them back to adult tick accept back to live mode do the same for the next sim then back in live mode once done turn the cheat off ctrl+shift+c hold all 3 together in the menu bar that appears at the top of the screen type in testingcheatsenabled false
