Young adults can be a parents for teens. It is weird.
How young adults can be a parents for a teens? In real life it is a very rare situation. Young adults are the people between approx. 20-35 years old. Teens 13-20. How young Sims can have such old chil...
Sociologists use 18-39 for "young adult" so I don't find it at all weird that one might have a teenage child. That would only take having children in your early to mid 20s.