Marble Fields
The tentacles felt as delicate as a sea anemone, undulating and imploring to be petted. the young man found playing with the tendrils pleasant and arousing.
Dragon Blossom - Chapter 4 Part 1
Gabe blushed and cupped his hand against the strange bulgy oval when he felt his friend's big blue shaft suddenly undulating in his mouth.
Kobold Kaos
Their tail was undulating in a serpentine manner, almost slithering through the air, with the bundled towel in a loop at the end.
Cruel Komodo
They undulate powerfully and forces me further down the slick tunnel without any effort!
Grove, Kuno, and the Slimes
An undulating ripple went up the length, milking a squirt of pre from the scout's twitching, eager member. encouraged by this, the slime started milking kuno in earnest, sucking and tugging at his cock, slowly working him up to climax. "stop...
But... You're a Female!
undulating waves coursed over neika's long, slick tongue, sending secretions quickly oozing out. neika's soft walls then began pulsating just like korvah's.
Never Take a Shortcut
The bumpy vine inside kory began to undulate, pushing deeper and deeper until it met with the barrier of hir cervix, remaining there.
Ghost wolf puppies
Eventually, the snake's undulations won out over ozzy's confused spasming, the egg squeezing through the last inches of his vas deferens and into his balls.
The Reptile House
The snakes undulated pleasantly around him, happy from the pleasure of fucking him, and their movement ended up shifting him across the grass.
On the Grape-Vine
The walls refused to yield, and instead, began to undulate in oddly rythmic motions. the walls seemingly ringed, or perhaps enwrapped by vines to emulate a churning motion.
Banyan Trilogy. Part 2 - Observations.
Along the vine peristaltic undulations rippled through the pucker of the dog, pumping gooey sap into the beast.
A Bitch In Her Bowels
Bethany's mind shrieked as she was dragged deeper into the undulating rectum.