Subtractions and Additions

A tutor was teaching her material when something wrong struck her. Has math always been this hard or something is happening to her?
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Hello People! Welcome back! I am so sorry that I have been gone for so long. Life, as some of you could have known, has not been so good lately. I am still trying to write for all of you though! And look here, I managed! I will try to post more often, I promise, and in the mean time, enjoy this story from yours truly!

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"Okay, so let's break it down one more time. You followin' me, Chad?" Emily asked, adjusting her glasses as she peered at the calculus problem on the book.

"Yeah, yeah, totally got it," Chad replied, his eyes wandering to the football game playing on his phone.

Emily frowned, but she pushed forward, determined to help him grasp the concept. "Alright, so when you're finding the derivative of this function, you need to use the chain rule..."

As she launched into her explanation, Emily didn't notice how she unconsciously began to fidget with the zipper of her jacket, pulling it down bit by bit without even realizing it, revealing more and more of the tank top underneath. She was too focused on trying to make Chad understand. But with each passing minute, her explanations became more convoluted as her mind began to fog.

"So, like, you see, Chad, when you're...um...finding the derivative, it's, like, super important to...um...keep track of the...um...variables," Emily stumbled, her cheeks flushing as she struggled to articulate her thoughts.

Chad watched her with a smirk, noticing the way her jacket had slipped down her shoulders, exposing more of her cleavage. He leaned back in his chair, feigning interest as Emily continued to babble on. "You're doing great, Em. Keep going."

Finally, Emily let out a frustrated sigh and tossed her marker onto the desk. "Ugh, I give up! I can't explain this anymore."

Chad's grin widened as he leaned forward, taking the marker from her hand. "Don't worry, Em, I got this."

Emily blinked in confusion as Chad effortlessly finished the problem, his explanations clear and concise. She couldn't help but feel a twinge of jealousy at how easily he seemed to understand. 

"Wow, Chad, you're, like, really smart," Emily said, her voice tinged with awe.

Chad chuckled, leaning back in his chair. "Thanks, Em. But you know, I couldn't have done it without your help."

Emily furrowed her brow, puzzled by his words. "What do you mean?"

But Chad just brushed off her question with a dismissive smile. "Don't worry about it. Hey, speaking of thanks, what are you gonna do to pay me back for tutoring you?"

Emily chewed on her bottom lip, her mind racing as she tried to come up with a suitable answer. And then, without thinking, she reached out and placed her hand on Chad's thigh, her touch lingering a little longer than necessary.

"Well, I could...um...show you my appreciation in other ways," Emily said, her voice dropping to a sultry whisper.

Chad's grin widened as he leaned in closer. "Oh yeah? Like what?"

Emily licked her lips, her heart pounding in her chest as she leaned in even closer. "Well, um...I could, like, suck your dick."

Chad's eyes sparkled with amusement as he leaned back in his chair, crossing his arms over his chest. "Sounds like a plan, Em. Let's get to it."