You stand still, frightened.
"Wha.. What are you going to do with me," you ask, shaking.
"There is no need to worry human. You will be transformed into my dragon mate."
You pray that he isn't gay, but you are just as frightened about the opposite result. You only get out one word in the form of a question.
"Female?"
"Yes, silly human. What did you think I was going to make you; male," the dragon looks at you intentfully, "Let's get started. Stay still."
You gasp as the dragon's dick slides out of his reptilian slit. He grabs hold of it, and promptly starts to masturbate. After a short while, he sprays his load all over you. You are caught off guard by his orgasm, as your attention had strayed to studying the dragon's body. You look at him in shock and disgust, but soon develop an itch. You look down to your arm to find green scales growing on your arm. The scales are quickly spreading all over your body, as bigger changes take affect. You feel your clothes start to get tight as your body starts to grow. He saw his nails fall off as claws grow in place of them. A draconian tail started to grow from his tailbone as the big changes started. He felt a tingling sensation in his groin, and unbuttoned his pants to observe what was happening, suddenly oblivious to his ears becoming pointed and his nipples starting to harden. He felt a sudden orgasm-like sensation as his male genitalia was sucked into is growing... vagina? He started to cry when his pecs grew into two scale-covered female breasts. His clothes started to rip rapidly, he felt horns growing out of his head, as his hair fell out in clumps. His.. or her body started to grow at a very rapid pace, as the dragon comes up behind you. You can smell him as your face pushes out into a draconian snout. As your transformation completes, the male dragon mounts you and penetrates your virgin vagina, and you gasp in pure bliss.
"Make me yours," you yell out as he thrusts in and out. As you both get closer and closer to orgasm, you look back to him. He looks up and smiles. Just then, you both share a powerful orgasm, and with that your new mate dismounts you.