[Story] Nerdy Werehorse GF Begs For Anal (Patreon)

My girlfriend, Emily, was always a paragon of nerdiness, her glasses perched on her freckled nose, her mind always lost in books or code. But I knew there was another side to her, a side she kept hidden away from the world.

We were in her apartment, the lights dim and the air charged with desire. Emily's breath came in short, eager gasps as she felt the onset of her transformation. It began subtly, her skin flushing with a heat that wasn't just from arousal.

"I can feel it," she whispered, her voice already changing, deepening as her body prepared for the shift. She grunted as her face started to elongate, her lips pulling back to reveal teeth that were growing blunter, her nose extending into a snout.

Her clothes strained as her body expanded, the fabric tearing slightly at the seams. Her spine arched, her buttocks swelling to an immense size, her butthole expanding in a way that was both shocking and mesmerizing. She grunted again, the sound guttural, animalistic, as her nostrils flared, taking in the scent of the room, of me.

"Please," she groaned, her voice a mix of human and beast, "I need it, I need you... in me." Her transformation was in full swing now, her limbs elongating, muscles bulging beneath her skin. Her freckles now spread across a broader, more equine face.

I moved closer, my own desire stoked by her transformation, the raw, primal need that radiated from her. Her begging became more desperate, her words interspersed with groans and deep, heavy breaths. "Please, fuck my ass," she pleaded, her voice a blend of her usual tone and something wild, untamed.

I positioned myself behind her, marveling at the enormity of her transformation. Her ass cheeks were vast and her butthole now a cavernous opening, pulsing with the rhythm of her heartbeat. I entered her slowly at first, feeling her body adjust, her muscles clenching around me, her grunts turning into moans of deep satisfaction.

"More," she gasped, her head turning slightly, her eyes wild with lust. I complied, moving faster, feeling her body respond, her anus spasming with each thrust. Her grunts grew louder, a mix of pain and pleasure, her nostrils flaring wide, taking in the musk of our coupling.

The room was filled with the sounds of our lovemaking — her heavy breathing, the slap of skin on skin, her grunts and snorts. The transformation had made her more, more than just the nerdy girl I loved; she was now a creature of desire, of need, her body demanding in ways I could barely fathom.

As we reached our climax, her body shuddered, the peak of her transformation aligning with our orgasm. She roared with bestial vigor as her legs clamped together. 

When it was over, she lay there, her body slowly returning to its human form, her breath evening out, her eyes soft once more behind her glasses. "Thank you," she murmured, her voice back to the one I knew, but with an undercurrent of something savage.

Note: This story was written with the help of AI.