Maid Cleaning Against the Clock or else a Spanking awaits

Mila arrives at her Mistress' house and finds a letter addressed to her, which reads "Dear Slave, Wear this Apron, go on your knees into submissive position. Wait for Me to return. Upon my return you will clean the house. A timer will be set for each room. Failure to complete your task within the allocated time will result in punishment." Mila follows her instructions and upon Mistress Roxy's return, she begins by cleaning the bathroom. The timer is set but Mila does not manage to clean it in time and a harsh OTK spanking ensues. Will she manage to do better with the rest of the house?