Susan Slept Here(1954)
OVERVIEW
On Christmas Eve, suffering from a case of writer's block, screenwriter Mark Christopher and his gofer Virgil get an unexpected visit from Sergeant Maizel. Knowing Christopher is working on a juvenile delinquent script, the sergeant brings by delinquent Susan thinking she will inspire Christopher while providing a place for her to spend the holidays outside of juvenile hall.
TAGLINE:
She slept in his bed...wore his pajamas - THEN SHE REALLY TOOK OVER!