nothing. that's what happened

Marlin: No. I promised him I'd never let anything happen to him.

Dory: Huh. That's a funny thing to promise.

Marlin: What?

Dory: Well, you can't never let anything happen to him. Then, nothing would ever happen to him. (Marlin stares at her.) Not much fun for little Harpo.

20 something years later, Nemo still couldn't forgive Marlin.

Don't spoil your kids.

Or else they will become the bitches, emos, hipsters, forever_alone(s) of tomorrow