Footsteps on the Stairs- A (Very) Short Story

I wrote this just now on a whim, and it represents a departure for me in that it mostly takes place in the reader's imagination, as opposed to taking place on the page as all of my other writing has. Not sure if this will work or not but it's worth a shot.   

     Ariana lay trembling, listening to the footsteps on the stairs marking her Aunt's slow ascent to her third story bedroom. Or, perhaps more precisely, her third story prison. It was just around sunset on a spring day. The date was April 15th, 1978. Ariana had last been outside of that particular room on September 24th, 1975.