Blank Slate - Parts 1 & 2
The member began to stiffen, lengthen, and grow hard, and soon, as sam's hand was forced to spread as the dick gained girth in the erection, it reached its as-yet-unseen full length, a few inches over a foot, now dripping with innate biological anticipation
A Bargain For Fate
One by one each cock gained fully functioning testicles swimming with horse seed ready to explode.
An Alternative Source of Income [Commission]
Looking at how wide of an ass he had, his earlier claim about being able to tame a horsecock definitely gained a lot more credibility.
Breaking Hinata
Bureka says pulling her lips off the cock when she sees hinata stating to lick and suck at the cock gain. "now suck on the head."
Syn’s Glory - Second Draft
She blinked as his cock visibly began to change shape and color; she found her heart racing as syn's cock gained a thick knot at the end and a more tapered tip as opposed to his previously fat and blunted tip.
The Cry of Sodom: Book One
Her arousal, unexpectedly, became a problem as the smooth shaft gained no friction on thamma's flushed sex, so productive were her feminine preparations for mating.
The legend of a warrior; Chapter 44: Heaven is not necessarily Paradise
Killer asked, and alexis smiled amusedly, crossing her arms under her enormous breasts that had people staring and drooling at her as much as killer's cock gained him attention. "i said heaven, lover.
The Iron Stable
With the tent running down his legs stretching the fabric ever further as his cock gained a new medial ring, the elastic bands that had once helped keep the fabric tight and taunt were being stretched to their very limits.
The legend of a warrior; Chapter 80 - Dark Dreams
Boadicea blushed deep red at that, but continued to stroke the almighty member, moving one hand down to squeeze hard into its fat, massive base while the other jerked rapidly along the top few feet of the great shaft, gaining a grunt of approval from alexis
The happiness found
Several minutes later, taska felt as her snout tired itself to be opened permanently in the mood for to have the bulk her father's penis, when she thought about taking a break rest, she listens as his father growls with more force and his penis gains volume
The Coach
He squirmed with the transformation of his cock, gaining barbs and a sheath even though the changes stopped at his waistline.
Power Over Them
I whisper to mary "mary, as soon as you make me cum, your saliva will make my cock gain two inches in length and half an inch in girth and make my erection twice as hard and my cum load will double!"