Jennifer's heart sank as the tingling over came her body again. It only took a moment for the feeling to concentrate on her lower back, on a small area just above her butt. Her coccyx slowly began to pop and crack within her, new muscles twitching slightly as her tiny tail bone gained a new purpose. Jennifer struggled to keep a straight face as it grew from her body, wiggling slightly as it moved against the inside of her tight panties. Hidden beneath her skirt Jennifer's new tail stretched her underwear, pulling it down ever so slightly as it continued its growth. Luckily it followed the crease of her toned backside as it grew down and curved upwards, snaking through her legs towards her front. As the tingling subsided the growth slowed to a stop with a final tuft of hair making itself known as it gently caressed her still human nether lips, an all too pleasant reminder of what had just happened.
"Well, it looks like I did deserve that." Chuckled Steven, the impish grins were now gone from the two boys faces, non the wiser to the new bovine attribute that Jennifer sported in her pants.
"Uuuuh yeah... right, bye." Jen managed get out as she pushed passed them before she said something else that she would regret. The boys shrugged it off as she ran into the school, making bets on what would change next.
Jennifer ran into the last stall in the bathroom slamming and locking the door behind her. She pulled her skirt and underwear off to inspect the damage. It felt surprisingly good to let her new appendage out as she instinctively flexed it, a shiver down her back at how natural it felt. When limp her tail reached just past her knees, the little tuft of black hair tickling the less sensitive back of her legs. It was bald save for the tuft and it was as soft as her own skin.
"It looks kind of cute" Jen thought to herself as she tried moving it, smiling when she succeeded in swishing it. "No, no it's not cute" she snapped at herself "I'm a girl. Not a cow. That bastard Kyle did this to me. I'm going to kill him for this!" She punctuated her thought as she slammed her fist into door. Footsteps and talking could be heard as some students came into the bathroom.
"Did you see that senior girl, Jennifer, on the bus today." One of them giggled
"Yeah, I think she was feeling a bit horny, if you know what I mean." Jen could hear them both giggling, her tail hung low between her legs as she gave her horns a rub.
"Yeah, she's a real heifer that one, just aching for a bull. Maybe she needs to head down to the old ranch?" The bell drowned out the laughter of the girls as they left for class. Pulling her skirt and panties up Jen tucked her tail between her legs again and left the stall; wiping the tears from her eyes on the way to her first lesson of the day.