In To Kill a Mockingbird, how does Dill's sudden appearance in Maycomb for the summer affect Scout?How is this summer different than the last one?

Scout and Dill plan to be married one
day:

A year
older than Scout, Dill has declared he will one day marry her, a statement she seems to
accept
matter-of-factly.

Scout
enjoys having Dill at first. She enjoys his mischievous behavior. He dares Jem to touch
the Radley house and Scout finds this extremely
daring:

He
instigates much of the children's mischief by daring Jem to perform acts such as
approaching the Radley house. He seems to have a limitless
imagination...

Jem, Scout and
Dill become very close playmates. They reenact many dramas. Particularly, they reenact
the drama based on the Radleys' place. They spend hours in the summer following their
delightful imaginations. Jem, Scout and Dill play in the treehouse out back. They
pretend to be Boo Radley and other Radley family members. Of course, Atticus tries to
put a stop to this, thinking it disrespectful. Scout, Jem and Dill think is is an
awesome game.

Later on, although Scout never says so, she
possibly resents Dill when he and Jem begin swimming lessons without her. Jem informs
Scout that he is going to teach Dill to swim and Scout is uninvited. Scout finds solace
in the company of Miss Maudie.

Dill spends the entire
summer playing with Jem and Scout. He even runs away from home one summer to be with Jem
and Scout.