Carlos becomes inthralled with the scent the mare is emitting, his mind thick with carnal thoughts and impulses; all he can think about is having sex with the beast. As he moves along the flank of the mare without thinking he lets out a small winnie and nips at the horse's butt cheek. Other than flinching slightly she doesn't move.
As he stands behind her he pushes her tail to one side with his hoof hand. Her cunt is slowly opening and closing and beads of vaginal fluid have formed around her slit. Breathing in the heady aroma of the mare in heat he leans in and with his long thick equine tongue begins to lap at the mare's juices. As the result of his minstrations the horse releases a squirt of urine which splases accross Carlos's muzzel. He's both repelled and turned on at the same time, making his dark brown horse cock begin to slither out of it's sheath.
Even with his newly aquired height Carlos is still a bit shorter than the mare. Just behind him he sees several metal strorage boxes that spare amnumition is stored in. He pulls his face from the female's rump and backs up stepping up onto one of the boxes giving him just the right height to service the mare. The horse sensing this change begins to back up searching for the source of pleasure her new found stallion had been giving her.
Carlos's horse dick was at full attention, all 24 inches of thick brown horsemeat straining to relieve itself. Precum oozing from his pulsing urethra he brings it to the females cunt hole and slowly slides it into her vagina stopping momentarily at his medial ring before hilting the mare. The newly borned werestallion feels a level of sexual pleasure never experienced as a man. With his large hands on both sides of the females rump he began to thrust in and out of the mare using his strong muscular legs and gluts to steady himself as he picks up speed. His human mind temporarely lost to his new stallion thoughts and desires as his human grunts and groans devolved into chuffs and snorts.
The females vaginal muscles clenching tighter against his cock making his pleasure levels shift into overdrive. He could feel his cock grow larger within her as he came closer to blowing his load. As he moves closer to climax Carlos could feel his large semen laiden balls pull up and prepare to unload his seed into the mare.
With one last thrust Carlos could actually feel his semen travel from his balls up the long shaft of his penis as squirt after squirt of stallion seed was planted into the grunting mare. Like a white veil his vision temporally left him as he climaxed. Exctasy like nothing he had experienced in his life with wave after wave of sheer pleasure causing his body to shudder. With a loud whinny he shouted to the world that this mare was his and he would challenge anyone for the right to breed with her.
Carlos laid his huge heaving muscular chest and arms over the back of the mare taking a few minutes to catch his breath and to recover from his marathon work out. His penis was still inside the mare but already he could feel it softning as it became flaccid. Finally with all the mental will he could muster he straightens up and as he does the horse steps forward pulling his cock out of her stretched vagina causing excess semen to flow freely out of her cunt running down her legs and onto the ground.
Feeling a bit weak kneed he carefully steps down trying to be as graceful as he can on his newly accuired hooves. Gazing down he's shocked at how big his new horse appendage is. Grabbing it with both hands he hefts it up to his snout smelling the nutty earthy scent as he uses his tongue and beguns to clean himself. He thinks to himself "a guy could really get used to this"!
Like waking from a long wonderful dream Carlos finally turns to Jack who says smiling "ok stud its my turn".