Hi guys, I've got a ploblam, my sim was pregnant with twins, and I forgot I used the speed up pregnancy cheat, so I made her go to a community lot with her boyfriend (farther of the babys) and since the speend up pregnancy was on, she give birth on the community lot, everything then worked fine, but when I made her go home the babys didn't go with her, and when I done add neighbour to family cheat, to try to bring them back, they wasn't listed, but it's in her memory and family tree that they exist, how can I bring them back?

Did you save? If you haven't just try again and don't let her go in the cab. That's the only thing i can think of.
If you have saved you CAN try to move the family out and back in and hope this will bring the babies back. If that doesn't work, Use the Insimenator on the communitylot to age the babies into kids and let them call a cab to bring them home. I'm not sure if this will work but it's worth a try.

I've tried all this and they are still missing???