Maria awoke to people moving her around. She felt too tired and powerless to struggle against it, almost compelled to let them do as they wanted as she absently listened to their words.
"If you just hold those in place...I'll get it buckled up round the back" said the first man, as she suddenly felt a coldness on her nipples. Following this was a pressure from them, squeezing her breasts into her body as she felt a strap go under her arms. They clipped together on her back, hugging her breasts tightly.
"There we go. She's awake now, so let's step out and let her figure out the rest" said the same voice. The two men, stepped out of the cage, locking it behind them again. One a guard, the other a scientist. Maria looked down at the contraption, two glass cups were attached to her nipples, held in place by the tight strap. Clear tubing stuck out from the ends, attached to a small machine with a lever, where the bucket sat underneath it.
Suddenly Maria felt excited, pushing the lever down, knowing what was coming next. The machine fired up, and Maria felt a wonderful suction on her nipples, slowly getting stronger. As it built up, a slow stream of milk started flowing from her breasts, draining her without using her own hands.
Once it really got going, the mooing commenced, each pump making her gasp, moan or moo out loud. Without even thinking, her hands slid down her pants, struggling slightly at how tight they were, then kicked them to one side. Straight away she started to rub her herself, amazed at how wet she already was. It even felt...puffier than before, almost bigger. She slid one finger in the ease, then two, then three. Before she knew it she was pumping most of her hand in and out, while the other worked on her swollen clit.
She noticed she'd gathered quite the audience around the cage, at least 10 staff were watching, but she didn't care. A small part of her was ashamed of what she was doing, and what they were doing to her. That part shut up quick though as she hit her first orgasm, mooing loudly while she bucked her wide hips against her hand.
She continued onwards though, eager to keep pleasuring herself while she was drained of her milk, even kind of wishing some of the audience would just enter the cage and participate.
She kept going for what felt like half an hour, one orgasm after another, as if the pleasure was increasing her milk production almost as fast as the pump could drain it. Finally the pump won and her breasts ran dry, her hands aching from all their hard work. Maria unclipped the straps, and the pumps swung towards the machine, hanging from it freely so she could use it as she wished. The bucket had overflowed, covering a large amount of the floor with her milk.
Legs quivering, Maria hobbled to her bed which had been swapped out for a comfy pile of hay, each step making an unfamiliar 'clopping' noise on the hard concrete floor. Looking down at her body, past her huge tits, she hadn't even realised that her legs and feet had changed. Her bottom half had thickened out even more than before, wide shapely thighs transitioned into a strong knee and calves, and her ankles had reshaped into little dew claws, followed by thick black hooves in place of her feet.
Any previous fear or doubt Maria had about changing was gone. She liked it, and judging by all the men staring at her, bulges in their trousers, they definitely liked her too.
Maria had planned on resting, but once she noticed the closest bulge, she couldn't take her eyes off it.