What leads Scout to feel so distant from her brother in chapter six of To Kill a Mockingbird?

Chapter six of Harper Lee's To Kill a Mockingbird starts out with Dill and Jem having plans on their final night of summer vacation that do not include Scout. The lady in the moon is out, the street lights are on, and the night is dark and hot. When Dill suggests they go for a walk, Scout is suspicious, which proves she is not in on the plan. The boys allow Scout to go along...

Chapter six of Harper Lee's To Kill a Mockingbird starts out with Dill and Jem having plans on their final night of summer vacation that do not include Scout. The lady in the moon is out, the street lights are on, and the night is dark and hot. When Dill suggests they go for a walk, Scout is suspicious, which proves she is not in on the plan. The boys allow Scout to go along to the Radley house as long as she doesn't mess things up. They want to peek into a broken shutter and get a glimpse of Boo Radley. The fact that she wasn't in on the boys' plan is one way Scout felt left-out that night.

The next way Scout feels like her influence on Jem is waning is when he goes to retrieve his pants which had been caught in the fence at the Radley house. She tries to convince him to stay and forget the pants, but he doesn't listen to her. Scout truly believes that Jem will get shot if he goes back to the Radley house; and she reasons that a whooping by Atticus is better than death. Jem sees it differently. He never wants to disappoint his father to the point of deserving a spanking. Jem would rather die than go through that. Scout's response is the following:

"It was then, I suppose, that Jem and I first began to part company. Sometimes I did not understand him, but my periods of bewilderment were short-lived. This was beyond me. 'Please,' I pleaded, 'can'tcha just think about it for a minute--by yourself on that place--'

'Shut up!'" (56).

Jem actually grabs Scout by the collar to get her to stop arguing with him about going to get his pants. He was going no matter what and tensions were higher between them than ever before. When Jem does come back, he doesn't say anything to Scout, and she doesn't say anything to him.