Ok, I guess I'm like Metro. Sim kids scare me!! I cannot take care of multiple Sims, but I wanted grandkids, so I made a man and I had him go out all over town! He had 24 kids, then I turned aging on, turned the short lifespan on and kept eating Life Fruits. Last time I played him, which was yesterday, he went next door to complete a challenge and ended up getting friendly with the woman, so now she's pregnant. She hadn't had the kid(s) yet. So, right now, I guess the answer to your question would be 24 kids, 2 grandsons, and 1 granddaughter!