Though used in real conversations, prompts are lazy writing. Unfortunately, prompts are common, especially in mass-market fiction. There are dozens of prompts, all worthy of deletion from a manuscript. Real emotions vary in intensity and duration. Fictional characters often fail to return to a calm state.
Good writing requires heightened emotions that explain motivations and allow for confrontations.
Cruel doesn't describe her. There is a fine distinction between dramatic effect and melodrama. Emotional dialogue contains hyperbole, with more passion than real conversation. Also, dramatic dialogue tends toward greater eloquence than daily speech. For years I have waited, patiently, quietly in the background.