Yes

In and out went the Rectal Rotor, fucking Erica in the ass while she frantically rubbed her clitoris. Mr. Ellery had adjusted the controls so that the Intruder **** itself about 18" deep into the poor girl's bowels, then pulled all the way out until it was about the same distance away from her, then rammed in again, over and over and over. In addition, as it entered her the metal ball was about the size of an orange, growing in diameter until it was bowling ball sized deep inside her, then shrinking again on the extraction.

Erica wailed as her ass was brutally fucked by the machine, her rectum stretched ridiculously huge by the ever-growing sphere inside of her. But she dutifully fingered herself, determined to orgasm. Her face hanging of the table was wet with her drool and the tears that welled up. Mr. Ellery, in his eagerness to adjust the machine perfectly, had forgotten all about fucking her mouth.

The heat and sensation in her bowels was beyond anything Erica had ever imagined before. The stretching she was enduring hurt, yes, but she couldn't deny that it was starting to feel pleasurable too. The constancy of the machine, and the exquisite spinning of the Intruder, and its enlargement inside her asshole -- all of these were making her clitoris hum, her nipples harden, her heart race.

"Oh, fuck," she moaned, "I think I'm going to cum!"

"No swearing in school," admonished the teacher. "But, good! Cum for my machine!"

The pounding, the friction, her clitoral rubbing all sent the cute teen deliriously over the edge. With one mighty shriek that shook the classroom windows and was surely heard throughout the school, Erica orgasmed, flopping around on the table as the machine pistoned away inside her ruined bowels.

Mr. Ellery flipped the machine off, and the massive metal sphere inside her gaped out asshole shrunk to its original size and withdrew back to its original position. She lifted her head weakly and smiled at the teacher.

"Thanks, Mr. Ellery! I think...I think I finally love anal!"