Word Processor of the Gods

In the days when dedicated word processors were still popular, the main character, a middle-aged writer tired of his wife (a fat, bad-tempered tyrant), son (an amateur musician with an attitude problem), and life in general, gets a gift from his nephew (a teenage genius) – a custom-built word processor. Unfortunately, the nephew has recently died in a car accident (at the hands of his own evil, violent brother who was driving drunk), so the writer must figure out on his own how to use it. He discovers that, with this word processor, he can write things into existence, and also delete them – at least, as long as the word processor can last. He erases his son and wife, and finally (seconds before the processor's demise) replaces them with his nephew and the nephew's kind, gentle mother. The story ends with the writer going inside with his new son.