I have never had triplets in a game before. Today luckily my Flowers family had three new baby girls, Pansy, Daisy, and Poppy.
This is how I did it:
Step 1 - Both parents (young adults) had fertility treatments
Step 2 - Romance
Step 3 - Didn't eat any watermelons, or apples
Step 4 - I put stereos and TVs set to kids channels in every room the mom sat in
Step 5 - Had mom read both baby books in the rooms with the stereos and TVs on kids channels
Step 6 - Had mom relax, and dad do everything, especially the stinky jobs
Step 7 - Waited four Sims days,
and got her to the hospital as fast as as the taxi could go! ![Grin ;D](https://www.carls-sims-4-guide.com/forum/Smileys/default/grin.gif)
The Flower triplets:
![](http://files.myopera.com/btiffin/albums/6527542/Screenshot-54sm.jpg)
The Flower triplets' room: