Simon by Vera Foxx

Simon is a monster/faun and human romcom with dark undertones, with Tarzan and Jane vibes, fated mates, he falls first and instant attraction. While this story is part of a series, you can read this spicy story as a stand-alone.
Simon hadn’t always walked on two legs. In fact, he had spent most of his life on four legs, as a goat and companion to a human raised by fae. He hadn’t seen himself as a pet; he had been much too smart for that. Simon had grasped human speech, surpassing the intelligence of the average goat, a concept beyond his comprehension.
His companion knew, though, treated him as his equal and when it came time to protect her, he jumped at the chance and the spell reversing potion fell onto his fur and changed him into what he was that day… a two-legged monster.
Simon ran away from his human and wandered the Monktona Wood alone. He learned to walk on two legs, used his hands, made tools, and built a home. He was more than an animal then, but speaking had been the last thing on his mind.
That changed when he stumbled upon a human female that made his heart beat faster and stirred something in his pouch.
Lucy was shy around males, no thanks to her father and her emotional disinterest towards the other opposite sex. Her curiosity about how the world worked and a desire to know all the things sparked something new inside her during a feverish dream with a not so human male.
While Lucy was supposed to gather information and map out the Monktona Wood, an ogre came in to steal her away, but it was a mysterious faun that took her first.
He was mute, he was touchy-feely, demanding, and he would not let her go.
He scented her, claimed her, and it would have taken the Moon Goddess herself to rip them apart.