I removed my mods and cc to see if that made her normal again but it didn't she looks like she's pregnant. It even looks like that in CAS
Edit By Crinrict: Adjusted Title
Please use th...
Ideas
Did some testing using another laptop where I didn't update the game and never used CC or mods to create a sim where I pushed all the sliders to the limit, in one direction and in the other direction. They have the weight and the muscle slider set to the middle in each case. Then duplicated this Sim and aged it down in CAS to a child, a toddler and an infant.
In terms of body, I only saw the distorsions for children (I wasn't able to have those buff infants I saw below, it would have been fun at least!)
But the faces are messed up for toddlers and infants (seems ok for children). Top is on a non updated game, and bottom is on an updated game:
On the bottom row, I would say toddlers and infants look older than they are supposed to.
As everyone said, it's easy to reproduce and there are plethora of Sims already on the gallery (and even on the game by default) where you can see those impacts. I have a link here updated on Google Drive including the screenshots, tray file for the family and a save.
If that's related to this finding of sliders for faces and body being used to age gradually those ages, that's not a bad thing. But I think the body sliders should be tuned way down in order not to have weirdly shaped children 😅