Johanna succeeds, unfortunately for both of them

Johanna throws back her head and moans with lust, her voluptuous buttocks quivering with need and the strain of controlling her imminent pleasure, while Lorelei continues to assail her sopping cleft with **** licking and sucking.

"Oh-o-o-o-ohhhh…ye—ye—ye, no! No! Oh—aahh-aaahhhhh!"

"Stop," you speak without urgency, but Lorelei complies instantly, her tongue disappearing back within her mouth, leaving her poor tute-partner denied upon the very brink of her much needed relief. It takes the Asian fresher a few moments to realize that all stimulation has ceased and stop the rhythmic rocking of her hips and open her eyes, panting with exertion. She stares at you for a second, before smoothing her mussed hair and trying to adopt the most demure position possible whilst straddling the face of the young woman who just licked her still-dripping twat to the edge of orgasm.

"I warned you of the consequences of failure," you say, unhooking a thin, whippy cane from the rack on the wall.

"Yes, Professor," Lorelei whimpers, "I'm very sorry, sir. I'm so sorry, Jo. Please may I receive the first stroke."

You tap the cane across her nipples, causing a flinch and a shudder; clearly her **** melons are exceptionally sensitive, especially the stiff pink nubs. You raise the rod to commence, but are interrupted by an unexpected source.

"Wait, Professor," Johanna looks scared stiff at remonstrating with you, but persists. "I don't think Lorelei should be punished—"

At this point, the girl in question interjects in a whisper: "No, Jo, please," but she continues without a break.

"—because she did her best and she didn't know she needed to be good at, um, cunnilingus. I mean, only males are normally entitled to tips and as a young woman, she couldn't be expected to prepare without guidance from an older man, so if nobody told her to practise…well, surely it's not fair to penalize her. You know how diligent and conscientious she is; she doesn't need a flogging to make her improve."