"Hey I was busy!" I yelled in a completely female voice.
"I've decided to join you for a bit of fun. Did you really think I would go to all the trouble of changing you partway for your own amusement? I have much more interesting things in store for you later on, but I want to take full advantage of your current form."
"Although it sounds kinky, I'll have to pass!"
"I'm afraid you don't have much of a choice"
I felt a strange twinge at the base of my spine, some kind of injector had been placed there that was obviously under Bessie's control. It made me feel everything, but I could not move my legs. Or now my abs, and slowly creeping up to my arms. Screaming in panic, only to be reassured it was temporary, a small consideration considering the very large cowtaur climbing onto the bed and positioning herself over top of me. Thankfully the effect stopped at my neck, but I would certainly not be able to struggle.
I could not see, but I could feel Bessie's udder up against my stomach, as if it had been my own. Her soft cow lips were against mine and I could suddenly feel her large 3 fingered hand massaging and penetrating my new vagina. Again, and again I climaxed, until Bessie tired enough to stop. She then straddled my chest with her big udder resting on my chin. Instinctively I knew she wanted me to suck on her, and my mouth was rewarded with warm milk. Moans of pleasure came from Bessie as I sunk into a deep sleep.