Guy found himself drifting from a post-orgasmic stupor towards a haze of sexual pleasure. He felt like the most sexual creature on the planet.
Guy’s huge cock was buried to the knot in his female, who was finally showing signs of her own change. She had grown much larger, her body now straddled him easily. Dark fur sprouted from her genitals and was rapidly spreading over her freshly darkened skin. Her canines had grown and turned into small tusks that protruded playfully from her mouth. Stacy’s eyes flashed open revealing golden animalistic eyes. She growled and purred as she thrusted against Guy, trying to drive his massive cock even deeper inside her.
Guy roared happily as the renewed thrusting stimulated his final round of changes. A long leonine tail snaked from his backside growing to over 2 feet in length. His legs became the powerful hind legs of the massive beast he had become. The hair on his head grew and spread into a shaggy black leonine mane that covered his shoulders, wrapped his face, and formed a thick trail down his chest and stomach that linked with the thick fur at the base of his cock. His hands became paw-like as his claws became retractable while the claws on his hind paws remained fixed.
Guy snarled as his face pushed out into a leonine muzzle filled with razor sharp teeth. Somehow Guy knew he was complete even as he watched Stacy’s changes continue and even pick up speed.
Two new rows of nipples appeared under Stacy’s breasts which rapidly grew into 2 more sets of fur covered breasts. Her body was now fully encased in shaggy black fur as she rapidly grew in size to match the male of her new species. Her muzzle was much more petite and her mane much less wild.
All in all the two lovers could no longer be mistaken for anything human. The lovers roared together as Guy came hard into Stacy once more.
Stacy rolled off Guy and crouched sexily on all fours. She looked back over her shoulder and winked at Guy as she moved her tail to the side and displayed her bestial slit to Guy, he growled as the sight and scent washed through his sexually over-charged brain. He roared as he plunged into Stacy again for a true bestial mating.