Petey Buttons

The film

An overlooked pencil-pusher catches her husband in bed with another woman, the shock of which causes him to die of a heart attack. So she buries his body and takes advantage of the growing celebrity status that comes from having a missing husband. But she quickly finds herself in over her head, dodging cops and criminals, all while trying to keep the truth from her sister, a local news anchor who’s desperate for a story.

Synopsis from TMDB.