It's my girlfriend, Sarah. While still surprised that the wish worked, I think that when Sarah suddenly appears naked, it will cause a bit of a panic. Thinking fast, I shout "I wish that all time would stop except for me!" As I finish everything around me slows to a stop. Nothing except for me is moving, probably in the whole world.
Now that I have a little more time, I head across the street to "observe" my handiwork. When I get next to Sarah I remember how beautiful she is. She is overweight, but that is what I love about her. She has been trying to gain some weight for my enjoyment, but it hasn't been going well. Every time she gains some weight, she loses it right away. Sarah isn't too happy with this turn of events, but she keeps trying for my sake. Of course, with this ring, maybe I could help her along.
Thinking about how to word the wish, I also remember that she does like a good anthro story, especially one with a dragoness. And she does sometimes fantasize about becoming one, so maybe I can toss that into the wish. Of course, an anthro dragoness appearing in the middle of the city might cause another bit of a panic, but I already see a way around that problem.
Finally, finished thinking about the wish, I say "I wish that my girlfriend Sarah was a beautiful anthro dragoness, and she always has been one." With an intense flash of light, Sarah is replaced by...