Sims 4 relatives?

I have Sims 4 on my laptop.
I wanted to ask how it works when I create a person that their sister, whom I would also create, lives in another house.
Or the parents!
Which mods are there that make the game look more realistic.

You can let them move in in a house and have them pulled out separately.

Create together, let move in.

Via "Manage World" you can then pull out the desired Sims.

Ah cool, thanks for your answer 😊

Thank you for your answer

I did it now, but where can I find their household?

In your library.