Bree and Lena were both doubled over with cramps in their stomachs. Lena reach forward to brace herself on the table as her jeans suddenly became very uncomfortable. Something was pressed inside them, and it wanted OUT. Her hands fumbled for her zipper, but when she finally managed to find and undo it, Lena and Bree both let out short screams.
A six inch phallus flopped out of Lena's panties and jeans. Beneath it were two egg sized balls in a hairless sack. To Lena's relief, she could still feel her vagina rubbing against her strained panties.
"Tell me I'm hallucinating." she said as she stared at the growth.
"Uh... I wish I could, believe me." Bree said. Her own dick hadn't started growing yet, but her clit had swelled considerably just looking at her friend's penis. Bree couldn't think of anything else. She wanted to touch it, feel the thick veins running down the length, and taste Lena's cum. A sharp pain in Lena's back caused her to yelp, and interrupt Bree's lusty thoughts.
"What's going on?!" Lena tore her pants and underwear off, and turned around. Bree was given full view of the growing tail. It was a short nub, covered in long hairs that continued to grow until Bree realized what was happening to her friend.
"You... you have a tail Lena. A horse's tail" Bree said. Lena gaped at Bree, and reached a nervous hand back to find that Bree was telling the truth. Her hand wrapped itself around the long silky hairs, brown and flowing down to the backs of her knees.
As it swished back and forth, Lena was inadvertently exposing herself for the world to see. Bree couldn't speak, but sensed Lena knew her body was changing again. Because as Bree watched Lena's pussy grow, Lena started to moan and massage her breasts. The once little slit became doughy, and then grew dark. Her lips swelled until they looked more like someone stuck pizza dough between Lena's thighs. It dripped as Lena became increasingly arousaed by her changes.
On hand moved down from her breasts to her penis. She could barely encompass it as the shaft grew and grew. Its girth became equal to that of an actual horse. A thick sheath enveloped about four inches of the shaft, which was gaining a mottled color scheme. The black and pink cock wasn't done changing yet though. The head flared, flattening itself while a ring of small bumps circled around the edge. Lena poked her hole, and to her delight found it was big enough for her to slide her index finger inside. It was like another vagina. Her ballsack grew a thin layer of hair, and soon Lena had a pelt of bay fur on her groin like a pair of furry undies.
Watching her friend masturbate, Bree couldn't stop her own changes from spreading as she too became increasingly aroused. Her clit shot forth and two balls fell into place. It wasn't yet a horsecock, but Bast knew it wouldn't be that long.
She got up from her place at the table, and walked behind Bree. She whispered in the mortal's ear, though Bree had no idea what was going on. But the words took effect anyway.
"Do what you were born to do. Don't fight it, heed the call of Dionysus. Let go." Bast murmured. Bree moaned, and grabbed her cock. Her touch heightened her lust, feelings bubbling up from inside her body.
Bast took a step back and chuckled as both girls were lost, slaves to their bodies. Oh how she only wished Dionysus himself could be here to revel in the moment. The god of wine, ecstasy, and fertility, his magic would only make this all the more fun.
"He'll thank me later to adding to his collection of satyrs. Thank me well..." Bast herself grew wet at the thought of her fellow god pounding her body until mountains shook for their orgasms. For now though, she'd have to wait and see what became of her "toys".
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*Quick note from the author - contrary to popular belief, according to the ORIGINAL Greek myths, satyrs were the companions of Dionysus, who had EQUINE-like features. NOT GOAT! Somewhere along the way, history and language melded the satyr with faun, and each became synonymous with the other. Don't believe me, Google it.