Ask Charlotte some questions

You’re caught very much by surprise, and feel shocked. "Alice is... sucking off the professor?"

Charlotte smiles. "Yes, most likely. He started taking off his underwear for his visits about a month ago. Two weeks ago she started taking her top and bra off at the end of his visits, basically to let him tit-fuck her. He's been making noises about using her mouth for the past week, so I expect that she is finally giving him fellatio."

You're flabbergasted. "Alice has been getting the prof off... for two weeks??"

Charlotte's eyebrows raised. "Ah, er, no. She's been jacking him off onto her chest and face for at least a month and a half."

You're taken by surprise once again, but before you can react, there is a rattling at the door to Alice and Charlotte's apartment.

Emerging from the dorm is a middle aged man wearing a fine tailored suit. A man matching your height, from behind him you can tell that he’s got crooked glasses hanging off his nose and a balding, receding hairline. He obviously let himself go, for his suit was barely containing his gut. Without a word, he shuffles through the threshold, closing the door after his passage, before turning around and running into both you and Charlotte.

Quickly regaining his composure, he smiles and addresses you first. “Good afternoon John! I hope you’ve been well.”

Still shocked from this situation, you do nothing but nod. You’ve only ever heard Alice talk about this prof, but you’ve never actually met him before now. Apparently though, he’s met you. What’s going on?

He then turns to Charlotte, almost as though he finally just noticed the girl a full head and a half taller than both of you. “Ahh, Charlotte. I was wondering why you didn’t join our study session today.”

Now that you were looking for it, you wondered how you’d barely missed it before. The moment the professor acknowledged Charlotte’s presence, the girl lifted her skirt and curtsied, her eyes avoiding his. There was no hesitation in her actions, her body moving with the familiarity of executing a move she’d done countless times in the past.

“I’m sorry sir,” she replied, speaking very quickly, “but my class finished a lot later than it normally does. You know I very much enjoy sitting in with the two of you, but this time I-“

“Don’t worry about it sweetheart. It happens” He cut her off, putting up a hand to silence her. He smiled at the clearly flustered girl before continuing. “I did miss having you around though. Do you mind if I take a quick fondle before I go.”

“Oh, um... er, go ahead sir.”

And you watch as this professor, easily thirty years older than the young undergrad, puts his hand underneath the girl’s blouse and gives her tit an ample squeeze. In response, she stands stock still.

A few seconds pass before his hand transfers from one breast to the other. As he squeezes the second one, he mumbles happily to the young girl. “You know Charlotte, I’ve gotten close with many girls your age over the years, and I must say: your tits are some of the finest I’ve played with.”

At his words, she blushed. “Um. Thank you sir. I- I’m, glad you enjoy them.”

He laughed at her words. “I hope some day soon, I can enjoy more of your charms as well.” He says grinning as he withdraws his hand. At that, her blush turned crimson, hiding the freckles on her face.

Saying nothing more to the flustered girl, he turns to you and nods. “John.”

And before you nod back, he starts making his way down the hallway you came, leaving you and Charlotte behind.

“Oh my god!” she mumbles, turning away in embarrassment once the professor has disappeared around the corner, “I can’t believe he did that in public!”

You simply stand there, amazed that Charlotte seems more flustered than insulted.