Why *not* get some professional advice about how to cope with the little hellion?
My husband has a colleague who had a few run-ins with his incompetent secretary. He finally lost his temper and yelled at her. She complained to management and they required him to have anger management therapy. This was *intended* as a reprimand to him. But he went and he thought it was great. “They teach you all sorts of tricks for how to cope with people who drive you crazy and basically how to achieve what you want,” he crowed afterward, “and they work! They really work!” Maybe I’m naive, but I’m sort of enchanted by the idea that there are some easily learned tricks that help reduce the frustration of having to live with people who drive you crazy.