The fugue

This episode is talking about how Wallace have been not taking Molly has a good father should be.
Kim is affronting this situation with him.Even molly is playing around she sometimes appear around both parents. I think that Molly is asking for attention of his father by talking secretly to his mother about the snail.
Wallace conversation with this old woman also is reflecting his passion for his profession. When he told her'' is was like breaking up. "you tell your self,never again.But then ,what else is there?''
I believe that Wallace love so much what he does ,that even he knows this profession is dangerous he still like to fight.As many sport professionals in real life  this is like a kind of addiction to him. He always is waiting for the next fight to come.