You change to male.

Your skin feels as though it has turned to liquid, flowing and rearranging as you revert back to your male form. Gemma watches your transformation wide eyed, but you see none of the disgust that you have come to expect. After shaking violently for some time with the cords biting harder into your skin as your ankles and wrists expand the change is complete.

"WOW." Gemma exclaims at last, breaking the uncomfortable silence. "That was....shit I don't have words to even describe that."

You have your eyes shut tight. You know that one look at Gemma will give you an instant erection and change you straight back. Even the knowledge that she's standing next to you naked, while you're tied down and at her mercy is causing you to strain to think of something other than her perky little breasts and her tight hairless pussy. You feel a touch as Gemma lays her hand on your thigh.

"It's ok to open your eyes John." She tells you. "As long as your skin is touching a woman you won't change, right?"

"That's right." You say cautiously opening your eyes. "You remembered."

"That's right Mistress Gemma." The teenage domme scolds you. "You're not going to be disobediant now you've got a penis are you John?"

"No, no of course not Mistress Gemma." You say quickly, suddenly horrified at the thought of displeasing her. "It was a mistake, please forgive me Mistress."

"Of course I forgive you." Gemma assures you. "We're both new to this. I'm sure it will take a little while until you're properly trained."

Gemma's hand moves over your thigh and her fingers stroke your cock. As you'd suspected the sight of Gemma standing naked beside the bed has caused your cock to begin stiffen. Her fingers wrap around the swelling shaft, speeding the process up.

"My this seems a lot bigger than I remember from when you got thrown into the locker room." She comments, playing with your cock. "I guess the cold shower that Chet and his gang gave you prevented me from seeing you at your best."

You nod in response, aware that your dick is rapidly hardening in Gemma's hand. Her fingers encircle the shaft, slowly wanking the stem and encouraging the flesh to swell to it's maximum rigid length.

"You really are a treasure for a domme that swings both ways." Gemma informs you with a giggle. "I get two subs for the price of one and no distracting bickering between you to worry about."

"I'm glad that you're pleased Mistress Gemma." You say quite honestly. "I was worried that you might lose interest once I was a guy."

"Oh no, not at all." Gemma reassures you. "Just because I enjoyed my time with your female form doesn't mean I'm going to enjoy you any less like this. I wish I'd thought ahead a little though and got some condoms ready within reach. A nice stiff cock inside me would be real good right now, but If I let go of your dick to go fetch one you'll change."

"Yes Mistress Gemma." You say sadly.

"Still I'm going to have to think of something to do with this cock, now it's got big and hard." She says teasingly. "I might not want to get pregnant, but I can think of a couple of ways I can get you off without any risk of that."

It takes you a moment to realise what Gemma means. You bite your lip realising that the dark haired minx intends to take your viginity for a second time. You wonder whether she'll simply wank you off or perhaps use her mouth.