"Is it... a cow udder? Why does it have six teats?" she asked. Mary was a bit puzzled. Seriously?
"Uh... I'm not sure... I ingested something and it grew that way; I think I didn't follow the instructions very closely. You... You don't find that weird? That I have an udder I mean."
"I didn't expect this. It's... I think it's cute?" Kristen paused for a bit. "If you're comfortable with that, would you let me touch it?"
Mary turned red again. "Oh... I guess! Please be gentle, it's very sensitive right now."
Kristen reached to Mary and caressed the side of her udder, stroking it lightly. The skin was very soft and the udder itself felt full of fluid - milk. She cupped the udder with both her hands to get a feel of its weight, accidentally brushing against the teats, and Mary let a slight moan escape from her mouth. "I'm sorry Kristen! This is so embarassing..." Kristen nodded but said nothing. She cupped the udder a bit firmer and gave a small tug on one of the teats. Mary let out another moan as a stream of milk escaped from the animal nipple and ran down her udder.
"It seems so full, Mary. I can feel the pressure with my hands. Are you going to be okay?" Kristen asked.
Mary looked down. She did feel increasingly bloated; her udder was protuding more and more by the hour, as though it was filling over time. Her teats were starting to ache.
"I would like to relieve the pressure. I probably need to milk it out. Maybe I could use the bathtub" Mary suggested.
Kristen smiled at her. "I have a better idea for now" she said with a wink. She then proceeded to kneel in front of Mary, who was backed against the locked door, and she leaned forward to bring her mouth to one of the teats. She began to suckle on it, one hand gripping Mary's hip and the other massageing her udder, while the white, sweet fluid filled her mouth.
Mary muffled another moan of pleasure, a bit shaky on her legs. She had no idea why the sensations felt so good, but the situation was turning her on madly. Her panties were starting to feel moist under her skirt.