Mika stared at the transformed centaur, sure that the former fighter was still inside mentally. The stallion was more than beautiful, he was mesmerizing. Mika pressed against the silky hide, feeling hot and anxious. His gut quivered, and his whole body throbbed with heat. He looked back at the still-erect shaft arching under the glossy black belly, and saw the massive testicles swelling out. Watching the sexual equipment sent a powerful surge of desire racing from his mind down to his loins, but he did not feel himself getting hard. There was a curious looseness, then dampness, and his hips seemed to thicken and shift. Confused, he looked down to see the last nub of a penis fade away as an equine udder emerged on his belly. Mika's eyes widened as he felt between his legs and discovered a massive, slick opening that had some very interesting sensations. He did not have to see the opening to know that he now had a mare's cunt. The stallion shifted forward, and Mika slid under his belly, facing forward. The animal was huge, and there was no way the boy could take the immense organ into him, yet he could not resist the powerful urges. The flat flare of the stallion's cock dropped and rose, and then caught in the folds of Mika's opening. The stallion did not thrust, he stood still, shuddering with anticipation. Mika back onto the thick organ, gasping as pleasure and instincts surged. His body throbbed, and he felt his back press into the stallion's belly. That was vaguely confusing, but he became aware of a strong, warm sense of belonging in his mind, a connection with the stallion. No, not the stallion - the centaur. He was still inside, and was somehow linking with Mika's mind. Just as the brush had transformed the centaur physically, now Mika's thoughts were being lovingly rearranged, and with them, his body. Her body. For as Mika's arms and hands stretched into forelegs and hooves, she realized she was becoming the stallion's mare. The male's weight pressed against her back, and then he was gripping her barreled sides with his forelegs and starting to thrust. Vision blurred, sounds and scents became intense, but Mika only had thoughts for her mate. The powerful stallion drove deep and hard, bringing her to blinding orgasm, and when eh finally gushed inside her, she whinnied with pleasure and primal satisfaction. The stallion remained on her back for a short time, then slowly slid off and then stroked her lathered neck. "A fine girl. You will bear beautiful foals." Mika was confused and twisted her head to see the centaur, fully restored, smiling at her. He chuckled. "I get transformed all the time, boy. It is usually quite pleasant, and you did a great job. I simply returned the favor, except that I also tweaked your mind. You will remember your past, but from now on you will be happiest as a horse, and have no desire to be anything else. And I am always successful mating, so you have a foal starting up in your belly."