Donna was being lied to!

"...you weren't failing her class. You had an A. Well, you did before she altered it in the system anyways."

Donna looks over at Mrs. Tan confused, her eyes full of doubt.

"It's pretty clear what happened then," your sister says, "This whore used you. She faked your scores to make you do dirty stuff to her."

"Yep. This bitch is quite devious," you add, "How does that make you feel, Donna?"

She starts to cry softly, but you can see angry determination in her eyes.

"Sit her up and loosen her bonds a bit," you say to your sister, "I don't think that she's going to be in a hurry to help out Mrs. Tan now."

She nods and undoes the cuffs locking the co-ed into a form of a hogtie. She helps the brunette sit up and rubs her shoulders softly. She even helps wipe the tears away from her eyes.

You, in turn, take the ball gag out of Mrs. Tan's mouth, but whisper in her ear that she had better not call out for help.

"It's time that you pay up for all your sins, you naughty teacher. How many students have you turned into your lesbian sex slaves in exchange for passing grades?"

"F-fifteen," the Asian woman admits shamefully.

"Wow, you've been busy," your sister exclaims.

"Indeed she has," you say, "So here's how this works. I am going to punish you for what you've done, while my sister over there makes things up for Donna. Right, sis?"

"Oh yeah. This girl needs to be treated properly by a nice lesbian."

She pulls the tape away from Donna's mouth and removes the gag. She whispers something in Donna's ear, which the girl nods softly in reply too.

Without saying anything aloud, your sister begins to unbutton the front of Donna's flannel night shirt, revealing her bare breasts to all in the room. She pulls the garment down off of her shoulders, stopping only at her hands which remain in handcuffs.

"I'm ready," your sister says, "Let's do it."

"Okay. You get one spanking on your ass for each girl. When you get one, call out the name of one of your victims. One!"

Your hand strikes down on the woman's naked, apple-shaped bottom with a hard smack.

"Jenya," Mrs. Tan says sharply.

"Madison," she says as another spank comes down.

"Jenni! Kristi! Jessica! Brooke! Candace! Tory!"

You and your sister share a look at this name confession. It's hard not to let your eyes wander down to Donna's chest as her luscious tits are being rubbed passionately.

You pause for a moment, but continue spanking the naked teacher- now with more vigor than before!

"Jade! Charley! Danni! Natalie! Celeste! Bobbi! Donna!"

You stop spanking her tight ass and switch to rubbing it softly. One of your fingers even works it's way into her pussy a bit.

"Confession is good for the soul," you say, "It gives you release. Speaking of which, I think it's time that you did a sexual favor for someone else. Do it right and your bondage will be more comfortable."

"Yes, please! I'll do it! Just tell me who!"