But then the quivering in her genitals came back, twice as strong. Mary bucked her hips as an orgasm started to build in her body. Her beasts exploded from her chest, and grew until they sagged down. They rubbed against something stiff, distracting Mary from the throbbing in her nether regions.
She carefully lifted her breasts out of the way to see rows of nipples pushing their way through her pig skin. They pushed and pushed, until she had three inch nipples hanging from her stomach. Milk soon filled them, making them full fledged pig teats. Her original breasts soon joined her new ones. Her nipples doubled in size and milk began to leak out. Her piggy teats swayed as Mary moaned in pleasure. She ran her hoof-hand over them, just brushing against her overly sensitive nipples. Eight new piggy teats hung low on her body, and were swollen with milk for a litter of piglets Mary didn't have yet.
"Jesus!" she cried out, the pressure in her clit building. With one hand, she fondled her breasts. The other slipped down and back into her gained lips. They felt rubbery and were slick with juices. As Mary pumped her hoof-hand in and out, her clit grew out. Her pee slit moved up, and her clit was soon a regular penis.
Her vagina shifted backwards a bit to make room for her new testicles. They dropped down, heavy into her new scrotum. The skin was hairy and wrinkled. Mary oinked, her nose turning up and her nostrils getting huge. Her bush spread out, down her now massive pink loins and around her growing asshole. Her pig tail wiggled against it, heightening her pleasure.
Her porcine cunt stretched, swelling and aching with need. The hair surrounding it became thicker and thicker, and spread down her legs. Soon Mary was covered in long wiry black hairs. Her pink skin was hidden underneath a layer of fur, and her nipples poked out from the hair. Her penis extended, not just becoming hard but taking on a pig shape. A hair sheath grew up half of it, before the head narrowed to a point. It became thinner, and the right size to be driven into a sow's waiting folds.
"More, need more!" Mary moaned, as her hands weren't doing the job. Below, her feet became stiff and hard. She rolled over on her side, and grimaced as her feet became hooves. Her feet melted together, then split in to. Nails spread out to cover her new hooves, and soon they're not much different than her hoof-hands.
Mary stands on her shaky legs, thick and covered in a mess of pig hair, sweat, and her own juices. Her penis bends forward, and then bumps against her balls. That's all it takes for Mary to blow her first male load. Pig cum, smelly, yellow and thick, is sent flying across the room. Her mind is overwhelmed with the orgasm, and she collapses to the ground again.
Mary passes out, missing the last of her transformation. Rolls of fat join her piggy teats, and her face pushes out into a piggy muzzle. Her teeth grow, and flatten out for eating things like roots and grains. Her penis, two feet long even though its soft, gains a bit of a twist to it. Soon Mary has a proper corkscrew to her new cock, and it lays spent on the ground. Her arms and legs swell with fat, and become a bit shorter. Her body retains a human-like cast to it, but a passerby wouldn't know the difference between Mary and a large boar.
Mary's dreams are filled with sows and boars, rutting and fucking any who would allow her. She came again in her sleep, old cum mixing with the new. She let out small oinks in her sleep, the pleasure taking control.