Jen watches as Ms. Higham walked off to go harass another set of students. From the sound of it, she still caught students out for minor violations of dress code, though it now seemed the dress code went in the opposite direction. The principal was already yelling at a set of girls in glasses that their "sweaters didn't show any cleavage" and their "skirts weren't short enough." The clothes of all the other students in the school grew a tiny bit skimpier as reality shifted. Jen could even feel her own top develop a keyhole and her shoes develop heels. Not to mention the makeup on her face.
Ms. Higham continued to rant at the now relatively conservatively dressed girls, but it was clear that due to her tongue lashing and air flowing through the vagina that now acted as her mouth, she was getting very aroused. It soon became too much for her and she came from her penis head on the unsuspecting girls. Everyone, including that group, continued to act as if three girls getting sprayed with the principal's semen was an everyday occurrence, with only Jen noticing the oddity. Apparently the bodily fluids of a changed person could also spread the mutation, because all of the girls getting yelled at started to change.
The first, a girl who had been wearing a non-cleavage-revealing sweater, didn't react as her breasts started to grow, eventually bursting out of her top, revealing that each tit had around a hundred tiny nipples, each lactating a different liquid, like beer, shampoo, honey, and so on.
The second girl, who had worn a skirt that extended past her knees, had her legs morphed into a twenty-foot-long snake-like tail, but made of human skin. She then grew new pairs of breasts below her old ones, extending down her torso and then her tail, all until the end where the tip morphed into a penis head.
The third girl, who had gone out without makeup, reached up and pulled her head off of her shoulders. Or, rather, out of her shoulders, its neck replaced with a two-foot-long penis penetrating a large vagina atop her body. A head crowned out of this new neckpussy, and the girl reached up and pulled it out as well, another copy of her dick-necked head. A third head popped up, but she didn't pull this one out, instead reaching the dicknecks of the other two heads beneath her skirt, where she shoved them into her original vagina and asshole.