Jennifer as usual ignored the class lecture, checking her makeup so she could look good for the next class which she shared with her boyfriend. A "WHAT the hell...?" yell from the front of the class got her attention though.
It was Ms. Jensen, who was caressing her face, like trying to remove some dust from her chin and cheeks. Jennifer checked with more attention her teacher's face and saw what happened: it was not dust, but stubble.
On Ms. Jensen's face, their gorgeous teacher with long black hair and tight blouse, a beard started to grow.
First a light stubble, almost unrecognizable, but in few seconds that stubble darkened quickly. Several short hairs poked out on her (once) smooth face, giving her facial features a more rugged look.
Then, as the time passed by, under the woman's fingers the stubble became a real beard, 1 or 2 inches long, thick as a man's.