Snape's laugh sounded nasty, Harry could hear him in his mind. "I invented that spell to hit your father, you know, but the Dark Lord killed him before I could use it. But I promise you will enjoy it's full effect Harriet."

At that very moment Harry realized he was and had always been Harriet Potter, daughter of James and Lilly. Snape went on in her mind. "You are a little slut, Harriet, always looking to snog a boy or another girl, with a special thirst to give your new headmaster Professor Snape a blowjob. And oh, you will never wear pants again, skirts and dresses only for you, giving easy access for anytime you're in for a quicky." And with a flick of his wand Harriet was wearing now a short skirt and a halter top barely containing her breasts that seemed to have doubled in size. In the mirror Harriet saw her face made up with heavy mascara and her lips painted black, her long black hair in a high ponytail. She could feel the garters that were holding her fishnet stockings and her heels were at least four inch high. "You will never wear flat shoes again" she heard Snape's voice in her mind. When she looked at him her mouth started watering, Snape's erection was clearly visible through his travel cloak.

She sat down on her knees and in seconds freed Snape's monster from his robes. Then she closed her black lips around it and started bobbing up and down, tickling his scrotum at the same time. He didn't last long, suddenly squirting his gunk in her mouth, Harriet eagerly lapping it up. Once more she heard his voice in her mind. "You will know in your mind each time I desire you. You will come as quickly as you can, apparating if you have to, and suck me empty and anyone else that I will point out to you. You will enjoy each and every time you make me cum and long for more. If I give you the privilege of taking you from behind or have someone take you from behind you will be allowed to cum yourself."

Harriet was very satisfied with herself looking up pleadingly at Snape hoping for another go. But Snape shook his head, saying out loud now "Very good Potter. I think we finally will get along. I only wish I had done this in your first year already. But maybe this is better now that you're coming of age. Tomorrow you will go shopping in Diagon alley for girl outfits, all as sexy as the school will allow. Don't worry about Death Eaters, they will leave you alone. The Dark Lord himself will visit us when we're back in Hogwarts and finish your transformation to becoming a full girl. That will satisfy the Prophecy that said that the boy that was marked by the Dark Lord could not survive while the other lives. Now I'm pretty sure he will mark you again once you're a girl."

And with that Snape left Harriet by herself, with just a few hours left until her birthday. She was not surprised to see that all of her clothing had changed to sexy, daring and showing female attire. Subconsciously she fixed up her lipstick and did some sexy poses in front of the mirror. She smiled when she thought of Snape, the fact that he could be trusted after all and the pleasure he would provide to her. And she thought of Dumbledore and the fact that he was still somehow around and he would love her new looks for sure as well.

She took off her clothes, lying down on the bed, playing with her nipples, imagining it was Ginny sucking them and just that fantasy made her cum from the only male part left on her body. Exhausted she fell asleep, only to wake up a full grown witch many hours later.