Again, Pat shuddered, but instead of falling back on four legs, she stayed on two. If anything, standing became easier for the morphing border collie as she now began to grow bigger and bipdedal. Slowly, her back legs were getting longer while her barreled body was becoming more shapely, more like a human female's torso.
Jack put his hand to his mouth and gasped as he saw the dog's nipples grow hard under her black and white fur, poking out some. Apparently the change felt good.
She now stood as tall as his chest, all of her having grown, and while she was a little shorter than she should be, her shape was quite humanized.
"S-Sorry master." She said suddenly, shocking the both of them. "It feels... good. I've never felt anything like this."
"You can talk!" Jack whispered, grinning.
"Yeah, I can talk." Pat giggled. "And if you don't keep this a secret, I'll tell everybody including your pa just what you used to do with me behind the shed."
"Hey, hey!" He mocked anger. "You'll freak the horses out."
The dog laughed and stared up at the human. "This is nice."
"Yeah." Jack beamed. "But hey, tell me this, did you... like it?"
She looked at him coyly and winked. "I never pulled away, did I? Now shut up and give me some more of that."
"Fine. You could stand to be a little more woman-like."
"You like it. A lot." She grinned as the human raised the bottle a second time. "I can smell it."
"It's true. I'm glad you like this."
"Love it." She admitted, and took another swig from the bottle.
"A lot." She said sharply, as again she began to grow. Now, from something between a dog and a human, Pat grew up taller and her body changed drastically. Her back legs grew long and powerful, shapely, with womanly hips, thighs, and shins. Her feet stayed that of a border collie, little claws clicking on the floor as she squirmed. Her top grew in definition. Six of her hard nipples faded, with her top ones stayed and started to grow out. Soon enough, she was getting breasts.
Jack's eyes widened in lust as the border collie grew into a tall, toned, and fit border collie woman. Standing just as tall as he, if not taller. "Damn, hound dog. You got sexy."
"Yeah..." Pat grinned evilly. "I reckon that last bit sure did make a woman of me, huh master?"
Without so much as a word between them, the dog woman and Jack began making out. Her furry hands undid his overalls and pushed them down, while his hands wrapped around her sizeable chest. Before long, they were laying next to each other, naked, save for Jack's cowboy hat.
"Well?" Pat spread her legs and fell on her back, revealing a moist pink gap in between her legs. "You gonna ride me or what, son?"
Jack laughed maniacally, and prepared to mount his collie woman.