I agree with your theory about reshoots and editing. We are left to fill in the blanks as to her feelings about Trigger. The film establishes Temple Drake as a sort of libertine. She comes across as the type of woman who could feel comfortable at a boxing match with all the rough language and shady characters, i.e. gangsters at those events, as well as at an Ivy League soiree, befitting her aristocratic upbringing. And Hopkins could play these women as well as anyone.
Love how you describe Temple Drake, and even more, what you say about Miriam Hopkins. Agree on both counts.