More babies in Sims 3?

Okay, so I have 2 adult Sims, and 6 children, making that 8 people in my household. However, I would like to have more than 6 kids. I know that in Sims 2, you could do a cheat code that would allow to you have as many kids as you wanted by clicking on a tombstone. However, I have not come across a way to do this for Sims 3. So, my question is, is there any way to get more kids using a cheat code? Any help at all would be wonderful! Thanks!