Darla stood up and faced then Dave as he stood just outside the stall used for his stud Donkey Tyson.
"You surmised enough to become a danger to me, therefore I needed some insurance to force you never to tell. I could have used the powers at my command to do to you what I did to your two brothers; they might have found your cute pussy as a worthy target if it and all of you were surrounded by donkey fur and stood looking like about any other jennet donkey. I did not wish to deny you of your future and lifestyle simply because of your high grades at school, and you are quite pretty.
I know, I know, you want to go out and tell the authorities what you surmised as learned, but I think you won't. Why you would ask, well most likely because of the barn surveillance cameras mounted above and to the sides of each barn stall. I have a glorious color video of you orally enjoying a donkey stud animal, showing you ingesting the semen, coughing as swallowing. I have no sound track that would be a witness for your defense if you told what you know. So I suggest you leave now, as you are welcome to come and visit your brothers if you so desire.
Yes, you may come again, but know as well that your ingesting of Tyson's semen has life changing properties. During the next few months you will notice slight differences in your anatomy, such as your cute pussy will darken. It will become larger, similar to that of a jennet donkey, and fur will sprout surrounding it. The furriness will cause you some personal distress that if you came for a visit, dear Philly might think you were a willing mate, and he might mate with you.
One full vaginal mating and the girl known as Darla Manson shall cease to exist. Instead, a new wandering woodland and prairie creature will evolve, a Donkey-girl, or of same as a donkey-satyr female. Imagine as can I, you with a full formed donkey head and face, donkey fur covering you from head to hoofs, you having a tail and equine genitals, furry human arms but a fore-hoof with a working thumb. As I would force you to live like that for say..., ten years, as after that lifestyle you will come begging me to transition you to be as all donkey, bodily, mentally, and lose your soul as well!
Now run home!" Dave told Darla as he had her tied and bound, incapable to tell what she knew.