Cassie knew a failed attempt of taking the ring back would spell doom, so she continued to suck her mother's folds for hours, waiting for her to lower her guards. Grabbing the ring would be nearly impossible as it was now on her moms finger. Right now Cassie was eating her mom's ass while fingering her pussy finding out the combined stimulation made her cum more and lowered their combined arousal significantly. After a while her mom was getting tired and she paid less attention to her arms, letting them drop to side. Cassie used this to her advantge. She grabbed her mom's hand and tried to take the ring off but her hand jerked and Cassie couldn't reach it anymore.
"I gave you a warning dear." Her mom said
"I wish I like turned into a cowgirl with big sweaty ass and milky tits and your whole live revolved around eating my dirty ass"
Her mom at this point didn't want to turn anybody back and just decided to go on a power trip. Trying to fix things just didn't seem important anymore. And it's not like anybody would stop her.
Sparks shot out of the ring as mom turned into a 40 years old cowgirl with pleasantly lactating breasts and udder and big butt with puckered asshole. Her leathery vagina tingled and oozed liquid that dripped into a puddle Her feet and hands turned into hooves and short white fur with black sploches sprinkled on her hide. The ring turned into a nose ring as her face was now that of a cow."I was thinking about becoming a southern girl, not a literal cow-girl. Not exactly what I had in mind but I look so hot."
Their environment changed to fit her new life. The walls turned wooden and straw laid across the floor. The door turned into a simple wooden one and beams held the roof. Their house was now a barn that housed Cassie's mom. Cassie herself now had features of human and cow. She had a big udder and puckered ass and a bit of elongated muzzle mouth but other than that she looked way more human than her mother.
Cassie's mom stood on all fours on the cold hard floor. Her tail raised and scent wafting through the air.
Cassie burried her face into the ass desperatelly, feeling like an ass slut she was. How could she ever stop doing this. She thought. There was nothing else in the world that gave her this amount of satisfaction than licking the sweat and bits off the pink donut around her mother's asshole. The scent alone was enough to make her orgasm constantly. She slobbered her tongue as much as she could, hugging the colossal ass that surrounded her.
The cow was rubbing her front hoofes against her leathery cunt, fluids covering her hooves as she laid on the floor presenting her ass to her slut of a daughter. Her intelligence dropped significantly to fit her new form, her tits and udder sprayed milk with each orgasm.
She moaned in a beastial way "Moooo, go deeper, need mooooooore." Unsatisfied with only having her ass face fucked on a surface level despite the still growing need in her poor sopping wet pussy she made another wish.