I applaud your inventiveness, dear reader!
It can be difficult to enjoy yourself sexually when you live in a small flat with friends or family. But opportunities for privacy do sometimes present themselves, and your idea of turning your domestic limitations into a challenge is commendable.
Perhaps the sound of the shower will also mask the smacks of a hairbrush on your bare bottom. After all, 15 minutes would be plenty of time for a good spanking – or even a sit-down dance on a panty-pulling chair.
I wonder if other readers have any equally creative ways of their own to play?