That's it slave. Now grab your whip or leather belt and get on all fours. If you used ice cubes instead of tooth paste, then melt another two on your shaft first.
Then I want you to punish yourself. Say "I'm sorry Natalie" with every stroke of the whip on you ass, and punish both cheeks in whatever order you like. This time, there is no limit - keep stroking until both of you ass cheeks hurt more than your arm and you'd rather stay on all fours than sit down.