My husband is really good at this. Who hasn't wallowed in self pity, imagining the pain they could cause their unappreciative loved ones simply by dying. Poems should address these shared experiences. Every adolescent needs to kill off their parents in some way. Fantasy about death is one way of distancing and at the same time testing the love.
Murder is extreme, but just an extension of the psychological process.
Not many actually do kill themselves or a parent, but it is definitely a normal fantasy. My husband says normal is a setting on your dryer. He read it on the wall in a restaurant toilet. What I love about the poem is the title, the last line, the cold blooded viciousness. The daughter reports what the mother wears at her death as if she were reporting fashion for the newspaper.