The Koopalings were never Bowser's kids in the games, only in the (non-canon and not made by Nintendo) cartoons.

Nice opinion, too bad I don't care

How about you shut the f**k up and grew up?

Oh,okay, sorry then, and while I still think "Who asked?".isn't the best argument in general, in that context it makes more sense.

Same can be said about literally anything, growing up is realising how dumb the argument "Who asked?" actually is, and I think it's time for you to grow up.

Yeah :(