In Sims 4, it’s impossible to have more than two babies (twins) with a single pregnancy. But as things work in the real world, some mothers give births to triplets and even quadruplets and quintuplets. Well, this mod does exactly that for us! It allows our Sims to have quadruplets and quintuplets when they’re pregnant! In fact, this mod lets your Sim carry up to six babies in their belly and give them birth all at once. The extension has tons of options that help your gameplay with a pregnant Sim.

The mod is no longer being maintained by Pekesims but an updated version has been posted to the comments by modder claudiasharon