Mom kept tugging at her new equipment, which quivered with need. Then a car door outside slammed shut. Dad was home early.
"I'm home!" he called into the house. An idea formed in my head, and the second I saw him, the changes started to take place. He screamed in pain, and a tail erupted by his behind. Mom began to moan obscenely, as Dad started to transform. She rushed over to him, and helped him remove his clothing. Her cock stands straight up in the air, almost like a fleshy tree. It's so hard, and I can only imagine how badly she wants to test it out.
Once Dad's naked, I could see the changes spreading. His new cow tail lashed back and forth as his balls and cock swelled. Fur covers his body, brown and soft. His balls are encased in a furry sack, and they hang low. But underneath then, there was something else. A new organ begins to drip down onto the floor. His tail lifted up to reveal a pink, doughy vagina. It's swollen and heat radiates from it. Dad's enlarged balls pull it down, and make the hole more obvious. Above is a black donut, his asshole.
"Fuck!" Dad cried, as his penis reached its full 2 foot length. Dark spots began o cover it until it was entirely black, save for a few small pink spots near the head, which flattened out. It puckered, and a bit of pre squirted out. Mom had been able to wait until now, but after seeing her husband's tool extend, she plunged herself into his new vagina.
I was glued to the scene before me. My parents fucking each other like animals. Bull riding bull, well more like half-bull. I got another idea in my head, and my dad starts to moo in pleasure. Above his bouncing cock, four nubs begin to press outward, as do the nipple on his chest. The seem to stretch out with every push from my mom's cock.
Soon he has four inch long teats hanging from his body. His chest grows, stopping just at what I would guess if EE cups. Then his stomach bloats with milk, and an udder takes its place above his cock. The sensitive head rubs against the teats, and Dad's orgasm is deafening. His moos fill the room, and soon Mom's moos join his. She cums, with yellow spunk leaking from my dad's cunt.
They lie on the floor, breathing heavily and in a mess of cum and sweat. I stand over them, an erection building in my own pants.
What to do next? I wonder.