I had one but it was involving Sims 3. Don't remember the mod I was using, but I was able to change the number of sims allowed to live on the same lot. I had done this because I wanted to keep a few extra family members on the same lot (the grandparents) without cutting down on the number of children born. Normally I don't like going past two babies at the same time, but I don't mind large families if the children are spaced out in age.
I had made a few mistakes with this one family. I had given both the husband and wife the trait reward that allows multiple births (twins/triplets), and I had the wife wish for a large family with the genie. She did get pregnant but ended up giving birth to ten babies. This was just too much for the parents to handle, so I hired a butler, but he didn't really help with the babies. My next option was to add Bonehilda, but she refused to help with the babies. Oh yes, this family also had twin toddlers to care for as well.