A gift for the guys

Shortly after leaving you return with what you left to get. Mia is still licking her sister's pussy, although you're pretty sure she would've gotten all of the cum out of there by now. As she hears you coming she pulls her face out of her sister's ass and kneels on the floor looking on as you reveal what you brought with you. In your hand are nine sharpies and a tube of lube. You walk up to Mia and she looks over her shoulder at you with a curious face as she puzzles what you're planning.

Without any explanation you squirt some lube onto her asshole and work it in with your finger. Tracy's face fills with pleasure as you start to work the lube around her insides with your fingers. Once she's loosened up enough, you start squirting the lube straight into her ass, so she'll be well prepared for it to be thoroughly used and also in preparation for what you're about to do next. You pull your fingers out of her ass and instead insert the sharpies in one by one. By the time you get to the fourth Tracy's really starting to feel it, and she's quite confused too.

"Oh fuck sir. What are you doing that for?"

As you stick the fifth marker into her ass you explain your reasoning. "When you get there, I want you to encourage the men to write whatever degrading stuff they want all over your body. And they'll be using these sharpies to do it."

Tracy bites her lip at the thought of having her body covered in humiliating words by a group of strangers as they use her.

"Yes sir, I understand."

Having inserted all nine sharpies you give her a smack on the ass before flipping her skirt back down over what little of her cheeks they cover.

"Alright then slut, lets get going. Mia, you wanna stay here or come with us?"

"I'll come if that's alright sir. I wanna see first hand what Tracy's gonna be dealing with for the next 20 hours." She gives Tracy a devillish smile knowing the immense pleasure she's about to experience from non-stop free use of her holes.

"Alright then, go put on some panties or something."

Mia quickly runs upstairs to chuck something on. She returns shortly wearing nothing but a pair of panties that disappear between her ass cheeks and a tank top that's probably Tracy's, given how her tits are overflowing out the top.

With that, the three of you head to the garage to get in your car. Tracy walks quite awkwardly at first thanks to the contents of her ass but eventually she gets used to it. As you get into your car with Mia next to you and Tracy seated in the back, Tracy sits down and her face gives off her discomfort. When she first sits without thinking of what's in her ass, the tips of the marker which were previously sticking out get shoved further into her ass by the seat.

"Oh fuck!"

"What's wrong, did you sit on something uncomfortable sis?" Mia laughs at her own joke as she says this.

"Very funny whore." Tracy snaps back before reaching behind her to make sure none of the markers have been dislodged, but thankfully they're all still firmly wedged into her rear end. With everyone in the car and ready to go, you head out towards the fraternity house.