Gabriel winced in pain as Emily's cock entered him and pierced his hymen.
After a few awkward seconds Gabriel was riding his wife's cock like a pro. Emily for her part thrusted up in pace to her husband's movements.
Jeff jerking himself off saw the first changes begin in his mother Emily.
Emily's skin tanned and started to grow hair all over, this wasn't normal human hair it was light brown horse hair.
Jeff looked at his father Gabriel and saw the first changes in him.
Gabriel's hair turned blonde with red highlights and began to lengthen till it reached his ass.
Emily's legs started bulking up and her toes fused into hooves allowing Emily to thrust harder up into Gabriel.
Gabriel's legs lost all the hair on them becoming nice and smooth, meanwhile becoming shapely and feminine. His thighs thickened meanwhile having come hints of muscles.
Emily's breast disappeared while her chest broadened and strengthened, her hands didn't change into hooves allowing her to still use them, her body was now covered in light brown horse hair except her neck and head.
Gabriel's chest expanded into breasts, his waist caving in giving him a wonderfully curvy figure, his middle becoming nice and toned. His fingers thinned and lengthen, while is finger nails grew becoming claw like.
Jeff checked on the Chronivac to see how large Gabriel's tits became and saw they were now I-cups
Emily sat up, pounding Gabriel harder as they leaned in to kiss each other as they grew taller with Emily being slightly taller the Gabriel. With the increase height you could see Gabriel's toned belly better under his large breasts, revealing a nice 4 pack.
Emily's ass flattened becoming muscular and a black horse tail grew out from above it. Her... no His hips thinned and his cock grew till it was 10 inches long, it thickened becoming that of a horse.
Gabriel's ass and hips expanded growing larger, her ass was nice and thick, not quite as large as her tits but close enough. Her pussy lips thickened and she swallowed more of Emily's length into her.
Surprisingly it didn't bulge her belly to much.
Nine blonde furred fox tails popped into existence from the base of Gabriel's tail bone, above her large ass.
Gabriel began moaning harder and loader into Emily's mouth as they continued to kiss.
Emily held onto Gabriel's shoulders keeping them pressed together.
Gabriel's face morphed into what Jeff would describe as a very sexy feminine face, her voice was also very feminine, but Jeff would describe it further as sexy and commanding. Her ears migrated to the top of her head, morphing into blonde furred fox ears.
Jeff used the Chronivac to see if Gabriel's eyes and teeth had changed, which they had. Gabriel had heterochromia now, one eye was amber in color and was slitted like a fox, the other was red in color and was also slitted like a fox. Her canines had changed somewhat, becoming sharper and a bit longer.
Emily's face morphed becoming masculine before being covered in the same horse hair as the rest of his body. His face continued to morph twisting into that of a horse with a short black hair mane.
Jeff noticed an aura start surrounding Gabriel. He quickly checked the Chronivac with his one free hand and saw that Gabriel was now a kitsune goddess. He smiled as now it meant he had divine blood in him.... as soon as his changes start.
Gabriel broke off the kiss and leaned her head back as she felt... incredible, she felt so strong and powerful and sexy, and even more so she was close to cumming.
Gabriel felt Emily's balls enlarge with cum and knew he was close to cumming as well.
The clock hit the hour and they came Emily's cum blotting Gabriel's toned belly as he pumped his seed into her shapely belly.
They were left panting after it and bewildered as they came to their post orgasm senses.
The house quickly change around them making them even more bewildered.
Jeff knew it was his and his sister's turn to change and cum.