All running at the same time?

[Gimpy8590]

So ther is ongoing age for other sims while playing your own, but is everything acting as a live neighborhood would? For example your sims are at home, another family is at the hospital, one sim died and other sims are tending to him, other sims are out t night enjoying themselves and other sims are at home doing their own thing 8) Is it like that or do u control 1 family at a time like in TS2 because I dont want ur sims friend to stay a teen while your sim grows up and dies. :o So is it al similtanious or 1 at a time