You shouldn't give ultimatums to people.
Mike notices that his son Tom still hasn't cleaned the dishes as he promised to do many hours earlier.
Mike wants the dishes to be cleaned.
Mike reminds Tom that he had promised to do the dishes, and they are still dirty.
Mike tells Tom to wash the dishes immediately, or he will be grounded for a month.
Tom apologizes and quickly makes his way to the kitchen to wash the dishes.
Tom is defiant in response to the ultimatum and refuses to comply with the request.