Taking a quick look into the game, it doesn't appear likely.
The minimum age of 16 for generated characters is hard-coded, so it can't be toggled dynamically without altering the game. There is some stuff in there for ages below 16, but it appears to be story gen. You also can not set an NPCs age below 16 even by altering their age with commands.
The code to alter an NPCs age is actually a bit complicated, because the game derives their age from their birth year and the current date in the game. This means in order to make them older you need to change their birth year. The code for this is birthyear[num] = newBirthYear, where num is the NPC number you can see if you enable cheats and go to an NPCs page. For example, if I wanted to make character 19 twenty years older, I would enter into the command injector:
birthyear[19] -= 20
This won't do any of the NPC gen heavy lifting, but it will actually change their age and their age category (so a teen will become a woman, etc.).