Maybe a spanking will encourage Amy to try harder to please you

"This is not good enough, young lady," you admonish sternly and the slim waitress quails before your disapprobation.

Picking up the metal ruler that is her implement, you turn her over your knee and wait for her to ask you to begin.

"I'm waiting, Amy," you say after a moment.

"I'm very sorry, sir, I don't know what I'm supposed to do next."

"Did nobody ever tell you it was polite to ask for each swat before you receive it?"

"Oh, no, sir! I'm sorry, sir, please may I have the first swat?"

"It's alright, it's not your fault if you didn't know. Remember to count each one and thank me." You start spanking her neat bottom and the backs of her thighs.

*WHAP*

"Oooh! One, thank-you, sir. Please may I have a second?"

The ruler has just enough flex to bend around her bronzed botty, spreading the impact across both cheeks.

*WHAP*

"Aaaah! Two, thank-you, sir. Please may I have a third?"

That one landed on the lower curve of her rump, setting it quivering. You decide to place the next on the top of her thighs.

*WHAP*

"Owwie! Three, thank-you, sir. Please may I have a fourth?"

"I'm afraid I can't tell how effective these swats are because of your tan, Amy."

"Yes, sir, I was told the same thing at my assessment. Since then, I've been wearing sunblock whenever I go out, but it's taking ages for the tan to fade. I'm very sorry to be causing you so much trouble."

"Well, I did think that three might be sufficient, but since I can't see any bruising or reddening of the skin, it's best to err on the side of caution and give you several more. Shall we make it up to a round dozen in total?"

"Thank-you, sir, that's very generous of you. Please may I have a fourth swat?"

*WHAP*

"Ah-ahh!" The smack low on her thighs makes the teen twist and her knees buckle. "Four, thank—"

"That is not acceptable! Keep your legs straight and your back arched to push out your bottom, even when it's your legs getting thrashed."

"I'm sor-r-ry. I'll try harder." She sounds on the point of tears now, but rights her position without a fuss.

"While we're on the subject, make sure you stay up on the tips of your toes and keep your fingers flat on the floor and parallel to each other; don't splay or bend them. If you do end up attending the university, you'll be expected to take a spanking gracefully, so you might as well get in practice. Now, we'll take that fourth one again."

"Yes, sir, thank-you, sir. Please may I have a fourth swat?"

*WHAP*

"Ohhh. Four, thank-you, sir. Please may I have a fifth?"

You begin to work your way back up, aiming the next across the middle of her thighs.

*WHAP*

"Uh. Five, thank-you, sir. Please may I have a sixth?"

*WHAP*

This one at the top of her legs once more.

"Nn-ng. Six, thank-you, sir. Please may I have a seventh?"

The following three work up over her bottom, causing more pronounced yelps and mewls, although she stoically remains in position and doesn't even clench her buttocks. Number ten lands right across the middle of both cheeks and the slight teenager moans and drops her head before counting, her shoulders heaving with her first sobs.

"Head up, young lady. There's nobody here except us, but you must show your face so that if there were somebody else watching, they'd be able to see the distress this is causing you."

"Yes, sir. Um…"

"Yes, Amy?"

"Am I getting the last stroke repeated?"

"No, this is the eleventh."

"Yes, sir, I understand. Please may I have the eleventh swat?"

*WHAP*

"Oh-oh-oh-oh, thank-you, sir. Oh, please may I have the twelfth?"

"Well, now we do need to repeat that one," you say sadly, "do you know why?" Although you still can't see the effects of the ruler on her delicate flesh, it is clearly a highly effective implement and you were hoping she would get to the end with no further errors.

She thinks for a moment and then whimpers piteously. "I forgot to count. Oh, I'm so stupid. I'm sorry, I just keep on making mistakes."

"Now, now, none of that. You're not stupid, you're just inexperienced. Give it some time and you'll be as adept at taking a thrashing as any of my students. They were just as green as you when they first started, you know. If I ever catch you belittling yourself again unduly, then I'll whip you raw, do you understand me, Amy?"

"Yes, sir, I do…and thank-you." She takes a deep breath and pushes herself back into the perfect position, body arched under exquisite tension to offer herself up to the coming chastisement. "Please may I have the eleventh swat, sir?"

*WHAP*

"Eleven, thank-you sir. Please may I have the twelfth stoke?"

*THWAPP!*

You finish with the hardest yet, right on the point where her thighs meet her buttocks, but she doesn't flinch, finding reserves of inner strength you doubt she knew she possessed.

"Twelve, thank-you, sir. I'm sorry for failing to satisfy you sexually. I'm really very grateful to you for punishing me, so please may I be permitted to show you my gratitude?"

You may not be able to see any bruises, but when your hands roam the battered bottom and thrashed thighs, they can feel a tightness and texture that speaks of pain destined to last many days. You slide your fingers between her legs and Amy shuffles her feet apart to give you access to her elegant slit, which you find to be quite dry and free from any indications of arousal. Clearly she's not in the mood for sex, which is just as well, because tipping isn't supposed to be pleasant for the tipper, after all.