What Carla didn't know was that there were a number of traps lying around the forest to keep the transformed humans from escaping. She had run right into one, which had trapped her hooves in the ground, keeping her from running off as you approached. You could smell her arousal as you got closer, your massive cock sliding out as it returned to its full length. You wanted to take this mare now, you weren't going to let her get away again.
Carla whinnied in fear before and tried to escape again before finally lowering her head in defeat. She was not going to be able to escape and she was about to be taken like a mare just like her girlfriend. What did she ever do to deserve this? Why was this stallion seemingly so focused on her?
She didn't get to dwell on that much longer as she felt the weight of the stallion on her back. She whinnied loudly as she felt the flared tip of his cock up against her vagina. With one mighty thrust she was filled with his shaft as she neighed loudly. It felt so weird to be filled like this, the stallion thrust faster into her, ramming into her as he did.
You were filled with lust and rage directed at the mare. He had pretended to be your best friend while banging your girlfriend behind your back. This was the perfect revenge in your mind, stripping him of his humanity and gender and making him your mare. You had fully given over to your animal side in your anger, and you loved it as you thrust into him faster, feeling the vaginal muscles constrict around your shaft.
Carla threw her head back as her mind started to slip away. The human side of her was fading as the mare took charge. She wanted to be mated, to have the stallion fill her with his seed and impregnate her. She whinnied loudly as she tried to move with the thrusts a little, begging for his seed.
She didn't have to wait much longer as he thrust into her one last time and his balls twitched. Cum spurted out of his cock and filled her womb as her muscles clamped down on him, drawing out as much seed as possible. Now there was nothing left of their old lives, just a mare and a stallion consumed by lust.
As the last of your seed filled her, you slowly pulled out, your seed dripping down her hind legs as you started to graze together. You no longer cared about your old life, now you were just a horse and you were happy.
The attendant smiled as she walked over to the two horses and lead them back towards the stables. She had a fine stud and broodmare now, and she knew that they would never be able to go back. She put them in their stalls next to Jessica as they started to eat, there was nothing to remind them of who they once were.