Notice how we get our happy ending....

Travolta's girlfriend just ups and leaves him. Guess she didn't really love him after all or not enough to stay by him and help him work through his problems with his kid and ex wife.
Oh look! Now he's available!

The ex wife miscarries. But it's OK to kill the baby since dad was a murdering A-hole anyway.

Rick is now dead which means ex wife is now available!

Baby is dead. Rick is dead. Boat business is burnt down to the ground and Danny needs a positive father figure and there is a nice big house for them all.
If that is not enough to re-bond them together, I don't know what is.

Humans are not the only species on earth.
We just act like it.