As Mark heard Sylvestor's remark he got very aroused and his cock was pulsing as he realized that the cameraman was about to turn his cock into an equine cunt.
W....w...Wait!!! Said Mark with a trembling voice as his cock was squirming under him.
Wait I want to jack myself off one final time!
Sylvester looked at his trembling member and said:
No.
As he said that his cold and slobery tongue started to suck on his cock and play around with it with his long donkey tongue from side to side.
He used the muscles in his lips which were very strong in equines for pulling out grass.
Mark started to whimper as he couldn't hold himself back anymore and dumped his load in the Jack's mouth.
As he did that Mark started to whimper in pleasure as the exhiliriating sensation he got from his orgasm wasn't stopping.
His balls squeezed past the Jack's lips and back into his abdomen with a jolt to his basin while his cock was continuously being chomped on in the Jack's mouth stimulating him like never before in his life. As his cock started receding in his abdomen Mark spasmed in his restraints as he contorted his belly with no release whimpering from pleasure while being in the Jack's mouth.
His receding member created a channel in between his legs and a slit that ran all the way in fron of him.
As Sylvestor saw this he pushed his long equine tongue into his brand new hole making him wither and and contort as his body was coming to terms with its new anatomy.
I... I have a...
"Cunt" said Sylvestor. How does it feel to transition from man to a bitch with a cunt.
Mark didn't know what to say as he looked at the jack and her cum coated groin where a dick stood moments ago.
As he went around he started lapping with his tongue at his wrists and hands.
Mark noticed that his saliva was very sticky from all of the cum his body had produced that day and all of his life without accomplishing anything.
As he painted his hands with the sticky saliva he noticed his fingers sticking together and balling up into a fist as his thumb and pinky fingers were reabsorbed into his body.
He felt very aroused as he had dreamed of the moment his hands would ball up into hooves.
Without his paying attention Sylvester did the same to his legs as they also lengthened and created his hooks and the very recognizable black donkey hooves at the end.
As he admired his new hooves he heard Sylvester say: Do his back legs and back. I want to ride this Jenny.
As he said that his restraints were freed and his legs started bulking up along with his back in order to support much more then her own weigh.
Mark stumbled awkwardly on the haybale until he could write himself.
As he trashed around he managed to get on all fours and on his 4 brand new black donkey hooves.
I have hooves he said as he walked around very aroused at the prospect of walking on 4 hooves for the first time.
Now what you will have is a equine cock in that pussy of yours.
Without even being prepared for it the Jack jumped on the Jenny and secured her flanks with his legs trusting his member under her sussy so the new Jenny could feel it.
Marks oussy was on fire and his male brain had never coped with these extremely powerful female sensations as he began.
It standing so close to me, it shouldn't be possible.
But it is!
As he said that he pulled back and rammed his equine cock in the pussy of the new Jenny who brayed for the first time.
Hawwwww Heeeeaaaaeeeeeeeeeeeehaw. Sylvester pumped at the Jenny's pussy as hard as he could and using long strokes which brought the new Jenny to multiple orgasms while Sylvester was nipping with his teeth at his head and body
Mark's pleasure never ended as it came down from his pussy and reached his heart again and again, he could feel it coming and every time he would bray like the Jenny he was becoming.
Then in a final sporatic bray Sylvester pushed as deep as he could when he heard the Jenny pant signaling her orgasm was coming.
He pushed all the way in and his flanks were all the way on the Jenny's hindquarters.
Mark bellowed his heart out in a bray that rocked the room as his head and his transformation into a Jenny was coming to an end. Heeeeheehaaaaaahheeeeehaw heeeeeeee HAAAAwwwww Aww Heeee haaw.
Cry! Cry for me! and show me how much you love having a cock back in between your legs.
The Jenny kept on braying with the jack on her back as he moved from time to time to keep the pleasure of the Jenny going.
I long to see you try to use those hooves of yours to touch yourself only to come to me for release, again and again!!!
Enjoy your cunt,
I know I will, female.