"WAIT!" Dan yelled...
"Yes?" Kat stood, smiling.
"Erm..." Dan looked up at her, fear spread across his face.
"Okay, I'll pick for you!"
"NOOOOOOOOOOOOOOOO!" Dan shouted.
Kat just waved her wand "To late little brother, I am a busy person."
Dan suddendly felt a cramp in his stomach, he bended over on the floor. He felt he was gaining weight, he was growing bigger Dan realized. There was a pressure building in his jeans and so was there in his shirt.
"O you poor indecisive boy, let me help you with that" Kat laughed and waved her wand a second time. All of Dan's clothes vanished.
Dan was embarrased he was standing on hands and feet, naked in front of his sister "Why are you doing this? uggghh" Dan felt another cramp there were patches of light hair growing on his body.
"Like I said, my not so smart brother, you were always a mean rotten kid, i am just making you more useful" Kat was smilling
Dan felt a pain in his hands and feet, they were turning black and numb. "Hooves" Dan said in fear, this was not good. He felt his bones grow and rearrange. There was now growing hair all over his body "What the fuck" Dan recognized the spots of black and white fur. "Stop this right nooooooww, moooo" Dan's face was pushing out in a snout, he felt his ears getting softer bigger and they flopped on his head.
"WEll I thought It was only fair, to turn you into a useful animal, since you coulde'nt make a decision" Kat pedded Dan's now cow head "Who is my little sister, yes you will be" Kat laughed
"Mooooo" Dan was shocked he could no longer talk like a human. All because of that dreadfull sister of his. Dan was now almost full cow, how long was it going to take before... Dan felt a warm tingeling in his cock and hanging balls. "Moooooo"He felt his genitals retracting in his body. Then he felt a strange feeling under his anus. He knew what it was, he would have a cow vagina soon.
Dan felt the skin under his anus open, there was a pair of leathery lips forming on the sides of his vagina. "MOOOOOOOOO" Dan felt something nice, but strange. He turned his bovine head.
There stood Kat, she just stabbed a finger in "his" slit. "Owww you dirty little girl, have you got no shame? " Kat stabbed in another finger. Dan felt his vagina cramp, this was so good. He could not control himself as he felt his cow slit moisten with fluids.
"Tsk, Tsk, Danny You may not be able to talk but I am able to read you mind, ahahahahaha" Kat walked in front of Dan.
"You bitch, mom is going to get you for this" Dan said mentally. Dan tried to bite Kat, but he found that he could only stand still.
"Oooo, I dont think so, when I am done with you, you will be just like any other heifer" Kat smiled "It's time you recieve the feature where cows are so famous about"
"What is ,,," Dan felt already felt a warm tingeling, his nipple were swelling, they traveld down to just under his stomach. There they combined. Moooooo was all Dan could let out as he felt a bulge growing, his human nipple split and formed 4 big fat teats. Dan could feel his new udder grow.
"My Dan, what a nice pair of mammeries you have there, all the other girls will be jealous" Kat gently tugged on one teat.
Dan felt his cow teats tighten and swell, Dan turned his head, All he could see were 4 fat teats proudly poking into the air. He found out that he could move a little, he carefully took a step.
Oooo He felt his sagging Udder sway between his legs " Kat you know, that youre probaly are sick and need help. If you turn me back, we will go to the hospital right now" Dan said mentally, mabey there was still a chance to escape this faith.
"HaHaHaHa, don't you like being a fat proud heifer, your calfs will serve generations to come? Dan I expected more from you" Kat waved her wand a final time
Dab, felt a tail spawn out of his butt. He cried, he was never been so embarrased, and certainly not in front of his sister.
"There all done, now youre a usefull big fat heifer, now see if we can start the milk production, ofcourse only pregnant animals can give milk"Kat smiled
"You, you can't milk me, I am your own brother" Dan cried in panic
".....Well you seem more like a girl to me anyway" Kat said with a glare.