Again the shopkeeper asked you to sit down. "And listen to me attentively."
"Since we don't want the ‘mistress’ to discover you're a princess, and even less that you didn't loose your humanity, a crash-course on basic shape-shifting will be required."
"The first thing to know is that, as long as it's an animal and female, you can technically take its form. But the farther it is from human, the harder it is."
"Now, I want you to concentrate and imagine your wings melting into your body." You did as instructed and, slowly, you felt your wings disappear, a bit like your back absorbed them through a straw.
"Oh, you're a fast learner. Good. Now imagine what a human version of your current self would look like. Seeing it?" You nodded. "Now try taking the guise of this non-existing version of you." First you felt your talons melting into dainty fingers, then your eyes tingled, your ass absorbed your tail like it was a spaghetti and, finally, you felt your legs and feet remodel themselves in a more usual configuration.
Once your transformation ended, you used the mirror to look at yourself again. You may not have changed much, may basically be you as a human, to you it still felt like a disguise, like it was almost you but not exactly. Strangely it wasn't the woman's legs that disturbed you, but your now perfectly human-looking brown pupils.
"I know you used to be a man, but this is probably how your family remember you from now on. While they still think you are human, they also think you were born a girl."
"Good!" You enthusiastically exclaimed. "It could have made things awkward otherwise."
"You can change back to your true form now, we will work on a disguise so the ‘mistress’ won't be any wiser.
… Using your shape-shifting, of course."
This time, knowing the basics and already having an idea on how you should look, you didn't wait for any instruction. First your skin turned back to the red it was after you first donned the costume that changed your life, except this time it included your face. Next came your eyes, which turned into endless pools of black, the same shade as your hairs. The same color applied itself on your talons and hooves, before you make your hairs grow while putting them in a side pony-tail. Their growth only stopped once the pony-tail reached your butt. As the final touch, you made your wings disappear.
In a slightly echoing voice, you seductively asked the shop-keeper "So… What do you think?"
Seeing the stunned look on said shopkeeper is all the answer you needed. "You should close your mouth, you know, or you might catch some flies" you said, with a big flirtatious smile.