I'm not sure specifically which 'anybody's nightmare true story' you are referring to. There could be many stories that might be considered someone's nightmare in real life, like a story of a person losing their home in a natural disaster or facing a serious illness without proper support.
To my knowledge, 'A Wife's Nightmare' isn't based on a true story. It's more likely a product of the writer's imagination and creativity to engage the audience.
Yes, the movie is rooted in a true story. However, for the sake of entertainment and to add depth to the narrative, some artistic liberties were taken during the adaptation process.