How is Scrooge's relationship to Tiny Tim at the end of the story?

Scrooge first takes notice of Tiny Tim when he visits the Cratchit house with the Ghost of Christmas Present.  He inquires about Tiny Tim and is disturbed when the ghost suggests that Tiny Tim will not survive.

When Scrooge awakens a changed man on Christmas morning, his thoughts go back to the Cratchits, and to Tiny Tim in particular.  He sends a large turkey to the Cratchit home.  The next day, he surprises Bob Cratchit...

Scrooge first takes notice of Tiny Tim when he visits the Cratchit house with the Ghost of Christmas Present.  He inquires about Tiny Tim and is disturbed when the ghost suggests that Tiny Tim will not survive.

When Scrooge awakens a changed man on Christmas morning, his thoughts go back to the Cratchits, and to Tiny Tim in particular.  He sends a large turkey to the Cratchit home.  The next day, he surprises Bob Cratchit with a raise that will help Bob better support his wife and six children.  

Scrooge's assistance of the Cratchits is not short lived.  The story tells us that Scrooge forms a relationship with Tiny Tim, and that he acts almost as a second father to him throughout the rest of his life.