Help? How long do NPC related to your household stay?

> @Coorul said:
> @Iowteacup I left adult children in my house for a long time. I don’t want to move them out because they have the good upbringing trait. I just made them playable when I finished whatever story i was finishing with my last sims. I’m pretty sure they don’t start aging until you make them playable.

Thanks a lot @Coorul I'm just so attached to my current sims I don't wanna get rid of them just yet while of course trying to make them look as legit of a family as possible. Again, thanks!