O I have families XD now here's how it goes, in my world families consist of a person, their siblings, their spouse and their best friend that they also marry, so they become their best friend ~forever~ (BFF). Families can grow quite big, as things an add on, you have a partner and BFF, and then they each they have their own BFF/partner, and those have /their/ own BFFs/partners and so on. They are still close to their parents, but things get a bit complicated ~on paper~
So here's my 2 main families:
Andrej is the leader of his family
He has a sister, Nina
Andrej has girlfriend Jade and best friend Tadej, he's not yet married/BFF married to them so they are not yet "officially" part of the family, but are still treated as such
Nina has a BFF Tim and husband Jure
Tim's soon to be husband is Cereal Killer not yet oficially family but treated as such
Cereal Killer's BFF is his knife
Jure's BFF is Simon
Simon's wife is Tina
Nina and Andrej's parents are Bunny and Richard
Tadej's parents are Theodore and Liliane who sadly passed away when Tadej was still a kid
Tim's mom is Jane, he doesn't know his dad
Cereal Killer doesn't know who his real parents are, but was adopted bought by Erica and Benjamin.
Jure's parents are James and Katie
Andreja is the leader of her family
She has a brother, Peter
Peter's BFF is Scarlett. Scarlett is married to herself
Peter's boyfriend is Edgar, but hasn't yet earned an official status in the family.
Andreja and Peter's parents are John and Carrie
Both families became closely connected to each other over time. They may be two separate families on paper, but they still consider themselves to be one big family :3
Also I'll straight up have to draw some sort of a diagram for this XD