Finding Nemo - Relationships

I have this formula that I lay onto movies.  It's generic enough to work.

Stories happen when a main characters' relationship with another, Fractures, like two atoms.

Stories end when a main character Bonds with another character, like two atoms.

In Finding Nemo, I'd like to stretch it a little.

Marlin's relationship with his wife becomes fractured when she is eaten.
He then bonds with Dory.  Though she doesn't make an appearance in the final scene.

Marlin's relationship with Nemo is fractured and then re-bonded.

The way I'm reconciling this second relationship is that since Nemo gains confidence he becomes a new fish by the time Marlin finds him again.

So, in effect Marlin is bonding with a new character.