You fail

It is time for this daemon to face his fate. You draw the sword of Saint Magdalena and charge at the beast. Just before you reach him, he twists his tail in a circular motion. The armored tail hits you in the side and smacks you against the tower wall. You slump to your knees, the air knocked out of your lungs.
Oh no, everything becomes dark. You try to resist it, but the darkness overwhelms you and you lose consciousness

When you become conscious again, you hear some sounds. They appear like grunts and moans. One is a male voice, the other a female. You open your eyes and direct your sight to the origin of the voices.
A little further, you see yourself and hands and knees. Your face rests again the floor and your ass is pointing up. The tonlet you wear is pushed up, above your stomach, near your midriff. In this position it no longer covers your hips.
Hang on, it isn’t yourself you’re seeing, it is Casey. It’s she whose lying there with her ass bare. Behind her is the hunter. Both his hands are holding Casey’s butt and he repeatedly slams his hips against hers. The reality of the situation dawns on you. Casey is being fucked by the hunter daemon.

You need to help her. You try to stand up, however you can’t bring your hands from behind your back. Dammit, the hunter must have tied you up.
You call out to Casey and yell “Transform to male!”

“I can’t!” Casey yells back between moans. “There’s a … foreign object … in the waaaaaay.”

“You doppelgangers aren’t as magnificent as you think you are, really.” The hunter says. “All you need is a dick in your cunt and you’re bound to remain female as long as it’s there. Though by the moans you produce, you don’t seem to mind that very much.”
As the hunter speaks Casey moans again. A long one this time.

You can’t watch this anymore. This portent of the near future. Without a doubt, once the hunter is done with her he’ll come for you. Not wanting to see what’s going to happen to you any longer, you turn your face away from them.

The hunter leans over Casey and whispers into her ear. “Here’s a little something many doppelgangers don’t even know. Once a seed has taken root in your womb, you’ll be stuck in your female gender until you give birth.”

Casey’s eyes grow wide and she begs “No, please, don’t do it.”

The hunter straightens his back and starts to fuck her harder.

“I beg you.” Casey calls again. “Don’t shoot inside me. I don’t want to be stuck in one gender.”

The hunter ignores her pleas and increases his pace. He grunts as he fucks the doppelganger hard and fast.
Casey makes one last attempt and yells “Pleeeeeaaase, doooooon’t cuuuuuum!” Though those words are disguised moans of pleasure.

Finally the hunter pulls Casey’s hips against his own, keeping his dick lodged inside her and moans loudly.
You remember how some time ago, this is what Casey was trying to do to you. How ironic that it’s happening to her now, and with a daemon no less.

When the hunter finishes filling Casey with his seed, he grabs her by the hair. He pulls her head up then slams it against the stone floor, knocking her ****. Casey slumps to the floor. Lifeless and silent.

“That should keep her from shifting before my seed can take root.” He says as he pulls out.

Then the hunter turns to you, lying on the ground, and slowly walks up to you.