Natasha Una

Natasha Una is a pre-created, playable character in Desiderata Valley which comes with The Sims 2: Freetime Expansion pack. She lives alone and is an only child and her parents are deceased. Natasha's aspiration is Grilled Cheese. Natasha's cousin Luis Aspir also lives in Desiderata Valley with his son's family. She possibly comes from German and Russian ancestry.

According to her memories, Natasha went to private school and her mother Katerina recently died after Natasha moved into her home. She is probably supposed to marry John Mole.

How is this possible?
Luis Aspir is an elder and she is an adult and they are both 3rd generation. How is this possible?