Cherie DeVille starts off in a box, a full sized cage, actually, and while it is uncomfortable it is at least safe. She wont be there long. Thanking him for kindness, asking him to cum, begging to serve, these are the signs of a polite and obedient slave. Normally that would be enough to avoid punishment, but not this time. The only reason PD needs to make her suffer is that he loves to see it.