Jennifer waited until dark and was still hiding behind the barn when she felt something tugging at her teat.
"Ow, " she said, and looked down to see a small calf. She slapped its snout. "Shoo, shoo, go away."
It mooed loudly at her. She turned to face it angrily, her hands on her wide hips.
"Quiet, or someone will see me, " she said angrily. The calf suddenly lurched forward, and grabbed hold of one of the teats of her udder. She tried to push it away, but it grasped tightly. As it began to suckle, she felt intense pleasure as the milk drained from her swollen udder. She felt weak at the knees, and had to sit down. The calf began to suck more earnestly, pulling the milk out harder and faster. The pleasure was overwhelming, and Jennifer couldn't help but moan softly. She imagined this was what a blow job must feel like.
The calf quickly finished, and began working another teat. She tried to feebly swat it away, but it just felt so good she didn't have the energy or willpower to stop it. She began to moo loudly, as the calf continued to suck her dry. She was so lost in pleasure she didn't realize that someone else was watching her in the dark, until a bright flashlight shined in her face.