I'm having the same problem... I'm in the 3rd generation - had 6 children on the first 2, but I'm having problems on this one. I've only got 4 children so far and there's no way of having another one. Both parents want children, I've gave that red shot and nothing...
Btw, in Virtual Villagers they women stop having babies at 50. Is it the same thing in Virtual Families? Or if it's not, how old they must be? Thanx