Pete froze in shock at the sight of her, blushing heavily. Petunia, already larger in her new form, was now even bigger in... certain areas. Namely, her breasts and udder both seemed to have swollen considerably, the anthro Miltank moaning and eagerly roaming her hands over them, droplets of white milk leaking out whenever she applied pressure.
"Pete," Petunia moaned out while touching herself. "Pete, I- I have milk! I need you... need you to milk me~!"
Pete, almost in a trance at that moment, quickly set to work, grabbing a bucket and moving over to her, placing his hands on her thick udder teats first, squeezing them tenderly. Her moaning moos echoed out as she began lactating into the bucket, spraying the warm, creamy liquid for him. He blushed at how much pleasure this was bringing her, continuing on.
It took quite a while and several buckets; she had much more milk than he was used to the Miltanks providing, not to mention two new teats to squeeze with her breasts. At some point, his father had come in to complain about how long he was taking, only to freeze at the sight and back off without another word, not sure how to process what he was witnessing.
Once he finished, he set out to finally do the same for the other Miltanks, only to be grabbed and pulled into a kiss by Petunia, her muzzle pressing into his lips.
"Come by again tonight so I can return the favor, Petey~..." she moaned softly, a hand roaming down between his legs to rub him gently. He blushed harder, nodding quickly before returning to his chores.
Even more than last night, the other Miltank seemed incredibly interested in what had happened. He wasn't sure what to think of that still. And as he let them out into the field, he took note of the farm's Tauros herd that shared the field, the bull Pokemon also seeming interested in the changed Miltank as she walked among her non-anthro sisters, giving him a flirty wave.
Things were only beginning to change around the farm. That night, Pete would again sneak out, only to find...