Some time later, you woke up on the floor of the hay-lined room. As you blinked and tried to remember the events that led you here, you realized that the brown horse-creature was crouched next to you, as if examining you with curiosity.
In a panic, you quickly pulled yourself to your feet, and found that you could barely keep your footing. You realized something was wrong right away as you clumsily staggered around, trying to keep your balance.
That's when you remembered.
Looking down, you saw that the white-furred horse creature was still firmly attached to your lower body. It seemed to have shrunk quite a bit, as if to fit your body more accurately, and you realized with horror that there was absolutely no room for your own legs in those slender, yet muscular horse calves. You ran your fingers along your waist, looking for the seam between your body and the horse's body but it wasn't there. It was as if your human form smoothly transitioned into the horse's body at your waist.
But if your legs were gone, how did you manage to stand and walk, albeit clumsily?
You stroked white fur of the horse thigh experimentally, and confirmed your fears. You could feel it as if it were part of your own body.
Looking straight down, you could see a pair of teats on your new crotch. That's right, you remembered, the creature that had absorbed you had been a mare. You reached down to delicately touch one and shuddered as you felt a tingle in the soft flesh. It was like touching your own skin, but very sensitive. You tried not to think about what lay beyond the mare's teats, just out of reach.
The other horse creature was still examining you with what you imagined to be curiosity.
You attempted to back away, and your horse legs moved immediately. Unfortunately, they didn't work quite like your old human legs, so you clumsily staggered backwards and almost fell over, windmilling your arms and stumbling around before regaining your balance.
You felt a twitch at the base of your spine, and realized that it must be the horse's tail. Craning your neck and body around as much as you could manage, you confirmed that you could now control the long, blonde-haired limb as if it was always part of your body, swishing it to the left and to the right experimentally.
It seemed as if this mare creature had entirely replaced your human lower body, fusing with you completely.
Panic set in, as you realized that this might be permanent.