Which is the underlined word? I can’t give you a proper answer unless I know.
The girl won't fight him?
OR
The girl won't fight him, will she?
<em>I'm fairly sure at least.</em>
Steve is defensive especially now that Don has pointed out that nobody knows what he has been doing in the basement. The evidence suggests that Steve is going to get angry at Steve for accusing him of causing all of the strange goings on in the neighborhood. To Don, this anger is more evidence that Steve is up to something.
The dash should be after the word strawberries.