Cassie's mouth thins out into a narrow cylinder with just an opening near the tip, which she plunged deep into her mothers asshole. She could tast every inch of her ass as her mouth hole widened to be the size of the cavity, fixing itself in place. Now only her tongue, which was over 2 feet long, could fit between her mother's rectum and her own mouth's lips, sliding back along her shaft of a mouth until it poked back outside, where it began happily licking at every crease and fold of the sweaty, dirty asshole of her mother.
Her own pussy became wide open, and a steady flow of her juices trickled out, dripping occasionally as it flowed down both legs. Her own asshole had disappeared, being absorbed by her leathery cunt. Cassie then took both arms a d shoved them deep into her mother's pussy, getting them more or less stuck inside, which made her mother bellow out a long Moooo in pleasure. Finally, her digestive system became an extension of her mothers, where it ended by converting her mothers waste into cum, which then emptied out of her gaping pussy.
Cassie no longer could even speak, not that she would ever need to anyways. She was living the life. Face deep into an amazing ass which would continue to feed her for the rest of her life as long as she kept pleasuring the leathery cunt underneath it. Why would she need a voice to complain if there was nothing to complain about?