Hmm, definitely an interesting start with Harry making his aunt into a sex slave; it should be interesting to see just how he uses and disciplines her as his slave. I thought the body jewelry was a nice touch, esp. if it was spelled to be seem/felt by no one else.
She's had her opportunities to deal fairly with him and hasn't, now she'll have to pay a price, and I wonder how long it'll take her to really enjoy that price.
It should be interesting to see the next few chapters.