Favourite Screenshot (or Tell Your Tales) - TSM Edition

Other than from baby to child, Sims don't age at all in this game. If one of your hero Sims is killed through other means, like the pit monster for example, and the have a child, the child is eligible to take over its parent's job. That's the only way a child can become an adult. Mind, however, if one of your hero Sims dies during a quest you will fail the quest. Not sure what happens if a non active hero dies, maybe Ceres knows.