NATO

They've been hanging a lot with Europe, so I'd imagine maybe sister (Queen) Europe is the mother.
Brother America sounds like the father who every now and then complains the child support he has to pay and sometimes takes either Nato sibling to a road trip to Asia.

@Tuiverrus I can't really see Bro America being the dad
I think NATO and EU are more like cousins if anything
Though they were created when the treaty was signed April 4th 1949
Like the original countries all signed their names and pop there NATO

NATO has no biological parents

I mean Denmark made a sand so why not?

I love how Sis NATO has gaint breast to show "breasts are terrifying" oooh