Luke Skywalker?
Bowser: Toadsworth never told you what happened to your father.
Mario: He-a told me enough... he told-a me you killed him!
Bowser: No, Mario. I am your father
Mario: NOOOOOO!
Wario: And I-ma you brother!
Mario: DOUBLE NOOOOOO!
Peach: And I'm your sister!
Mario: So?
Peach: That means we can't date anymore.
Mario: SUPER NOOOOOO!
Yoshi: And I'm Aunt's daughter's roommate's brother's step-son from the future!
Mario: THIS IS GETTING REDUNDENT!
Waluigi: And I have absolutly no relationship with your family's genealogy whatsoever!
Mario: Okaaaaay...
Seriously, this piece is rather chuckle worthy. Though, I can't blame the kids for think Luigi is Mario's older brother. That's usually the first impression someone would get (the taller brother is the older one).