Gemma blows you.

Gemma takes care to always keep contact with you as she teases and plays with your cock. The cords around your wrists and ankles bite into your flesh now you've transformed and your limbs have thickened. The girl's trainers and socks that you still have on from being a couple of sizes too big are now a size or two on the small size. Gemma squats beside the bed leaning over your groin, one hand is wrapped round your cock in a tight fist as she slowly pumps the rigid flesh. She leans closer and you feel her hot breath on your engorged cockhead.

"Would you like me to suck on the end?" Gemma asks, her lips almost touching the purplish bulb. "Or are you going to be naughty and squirt as soon as my mouth touches you?"

"Please Mistress, please suck my cock." You beg, almost whimpering with the agony of suspense. "I promise not to cum too quickly."

"Well, seeing as you begged so nicely." Gemma laughs.

She opens her mouth and lowers her head onto the tip of your dick. Her mouth is incredible hot and moist and your cock twitches as her lips slide over the glans. You screw your eyes tight, willing yourself not to ejaculate. Her tongue explores the trapped prick head, probing the glans and uretha.

"Oh my god Mistress Gemma that feels wonderful." You groan. "Thank you Mistress."

Gemma starts to bob her head, allowing more of your shaft to be swallowed. Half your length is sliding into her mouth with each dip of her head now. She pauses with about 4 inches of cock in her mouth and her cheeks hollow as she suckles on the shaft. After a moment she lifts her head back off and spits on the reddened tip, lubricating it with her saliva and smearing it all over your cock by wanking you with her clenched fist once more.

"Like that don't you?" She asks whilst her mouth is empty. "I wonder just how much of this I can take."

She goes down on you again, forcing her head down further on to the spit coated dick. You feel your cock head nudge at the back of her throat, but Gemma pushes harder. The heat and constriction on your flesh feels unbelievably good as Gemma makes an effort to swallow the last couple of inches of your cockstem. Her lips touch the very base of your cock as she succeeds in taking all 7 inches of your penis. She holds still a moment, savouring the acheivement before gagging and pulling her head back off.

"Are you ready to cum now John?" Gemma asks you. "I want to hear you beg to cum in my mouth."

"Please suck my cock Mistress Gemma." You plead, **** to empty your swollen balls. "Please make me cum Mistress."

Gemma seems satisfied with your response and she returns to sucking your shaft. Now her head dips with more speed, letting your cock slide in and out of her stretched lips. Her grip around the base of your shaft tightens and jerks your meat in synchronisation with the action of her mouth. The fingers of her free hand tighten around your balls, squeezing and kneading your gonads to encourage your release. At this you know that you can hold back no longer, your balls seem to be swollen beyond endurance and your cock starts to twitch madly in Gemma's mouth.

"I'm cumming Mistress." You cry out as you feel yourself about to erupt. "Oh jesus thank you Mistress."

Your balls start to pump, Gemma's squeezing assisting your powerful ejaculation. Gemma's head stops moving as your cockhead spurts your hot seed deep in her mouth. Again and again your cock jerks as your balls **** gobbets of sperm into Gemma's throat. She attempts to swallow as much of the warm, salty jism as she can, but the quantity jetting out your prick is too great. She pulls back for air before your balls are half empty, your cock continuing to twitch as long sticky threads are fired from it's tip. Gemma's face takes the full **** of your remaining sperm, leaving thick goopy trails running down her cheeks and chin.

"Ohh yes." Gemma gasps, closing her eyes and opening her mouth wide to catch the last spurts of juice. "That's a good boy, cum for your Mistress."