This was some very good writing, especially for something I'm completely unfamiliar with (and very curious about) so it was nice to see that its something that could be done like...normally, and not be like an awkward Dr. Jekyl/Mr. Hyde situation I imagined it would be. Especially for someone with such a position and being gracious enough to be both forward in his intentions and voicing his doubts and getting the green light before doing anything. I'd personally see myself too independent to do something like that but hell...you treat me this lovingly, I'll be your little kitty. If you ever continue this (or make games in the similar vein), I would super be looking forward to it just to learn more about relationships like this.
((obligatory off color comment: "...something has awakened inside of me and unfortunately it isn't Sebastian's c**k but now I have a new kink."))
EDIT: I didn't look at your catalogue. Pardon while I go roll around in there