Without any warning, Mary was besieged by the pig-woman. Jess had thrust all of her weight into Mary's torso, knocking her back onto her bed. Jess' three-digit hands pinned her to the mattress as Jess thrust her mouth over one of Mary's newly-formed teats and began to suckle madly.
Mary's fear at Jess' attack quickly switched to incredible pleasure. Her udder had grown back more full than before, and the relief it was beginning to feel was ten times better than going to the bathroom after holding it in all day. She gasped and moaned as Jess continued her wild suckling.
Meanwhile, Jess could feel her stomach filling with the warm liquid. Mary's milk tasted incredible. It was smooth and creamy, and as nourishing as any ordinary meal. She only paused from her feast to take quick snorts of air through her slightly larger nose. Eventually, the hunger subsided and her stomach filled to capacity. Jess slowed her suckling and became more aware of exactly what she was doing. Her eyes popped open and she jumped backward. A half-mouthful of milk dribbled down her chin as she stared agape at her friend, deathly embarrassed.
Mary was coming out of her haze, slowly sitting back up on her bed. She looked down at her sore teat, still covered in her own milk and Jess' saliva. Her udder was much flatter than before, and quite relieved. She looked back at Jess and saw the terrified expression in her face.
"Wow," was all Mary could say.
"Mary! I'm...I'm sorry!" Jess stammered.
"No, don't be. That felt...really damn good." Mary knew her head was flushed red, and was grateful that her fur was there to hide it. Jess, on the other hand, had no such help. He head was like a beet.
"I was just so hungry. I couldn't take it! I saw your udder and something inside me...ughh..." Jess suddenly felt a gurgling in her stomach. Was it having a problem with the milk?
She felt hot, and even heavier than before. A headache followed these sensations.
Mary stared, incredulous at Jess. "You're growing horns, Jess!" she cried.
Jess felt her head and confirmed that two short horns were now poking out of her hair. They felt like the same horns on Mary...cow horns! But she had only taken the Pig vial...
Her shirt tightened even more, and Jess heard fabric tearing. The pain was so great, she felt obliged to help. Her thick hoofed fingers found the holes in the sides of her shirt and pulled, tearing it off completely. Her breasts swung free, all eight of them. Her bra apparently had already snapped off. But the most shocking thing about them was they each had four-inch-long teats in place of nipples. Some even had small dark splotches, and Jess quickly found that large splotches were forming on the rest of her body. She wasn't growing fur, though. The splotches were in the pigment of her skin.
"There must have been some of the cow vial inside your milk," Jess guessed.
"Yeah," Mary said, staring at Jess' strange body. In a few seconds, she realized what she was doing and turned her head. "I'm sorry, I shouldn't be staring!"
"It's all right," Jess said, even though she'd rather Mary not look at her. "I just sucked your udder dry without permission. You have a right to stare."