A test subject

As you explain your hesitation in demonstrating the mind control ring's ability to professor Wilkins, he quickly agrees that testing it on him would be unwise. The 2 of you are thinking about what else to do when there's a knock on the door of the professor's office.

"Who is it?" professor Wilkins asks through the door.

"Crystal," a female voice responds.

"Crystal who?"

"Crystal Rae... I'm in your class."

Professor Wilkins thinks for a few seconds before he nods in recognition, remembering the student. "Come in," he says and the student enters. She's a brunette with a petite figure and she's dressed in a black tank top, jean shorts and an unzipped pink hoodie, standard college girl attire. She's cute, although she looks distressed. "What is it?" the professor asks. Crystal glances at you and hesitates. "Speak. He's fine," professor Wilkins says impatiently.

"I'm failing your class and... I would appreciate it if you could help me out. If I don't get at least a passing grade, I'm going to flunk out of college, professor. Please..." Crystal says sheepishly.

Professor Wilkins shakes his head and sighs and it looks like he's about to deny Crystal's plea when he pauses and looks at you instead. It takes you a moment to understand what his eyes are trying to tell you. Letting him see your actions, you activate the mind control ring and turn to Crystal.

"Crystal, you're doing to do and obey everything the professor says, got it?" you say. Crystal nods and you turn things over to the professor.

"Raise your left hand," professor Wilkins says as a first step. Crystal raises her left hand.

"Now your right hand and show me the finger." Crystal raises her right hand and gives him the middle finger.

"What did you have for breakfast this morning?"

"A yogurt," Crystal responds.

"What do you think of my class?"

"It's boring as hell. I thought it would be easy but your assignments are so difficult and you grade so tough."

Professor Wilkins looks at you. "What's the limit?"

"There is none," you say with a shrug and a grin, guessing where he's going with this.

Professor Wilkins turns back to Crystal and swallows hard before he speaks again. "Show me your tits," he says. Immediately, Crystal pulls her tank top up, revealing that she's not wearing a bra and showing her breasts. They're perfect for her body, even a little big, and with a lot of perk. "Don't move while I touch you," professor Wilkins says and he moves in on the young student and gropes her bare breasts. He's practically salivating and he spends so long playing with her breasts that you have to clear your throat to snap him out of it. Professor Wilkins nods and leans down to suck on Crystal's right breast briefly before he tells her to take off her shorts and turn around. She does as she's told. She's not wearing panties either and just like that she's bottomless and you and the professor get a good look at her shaved college pussy. You're starting to get horny again just looking at Crystal, but you decide to control your urges and let the professor have this 1.

Crystal's ass is tiny and smooth and the professor bends down to cup her ass cheeks in his faces and he kisses both sides. He doesn't linger on her ass though, as he suddenly starts taking off his clothes. His shirt is off when he stops and looks at you. "You don't mind, do you? You can wait outside if you want," he says.

You shake your head. "Not at all. Go ahead," you say and the professor proceeds to undress and get naked. You must admit he's in pretty good shape for his age and his cock is an impressive 7 inches and hard. You guess the professor doesn't have erectile dysfunction like a lot of men his age.

"Get on the sofa and and bend forward on your elbows and knees," the professor says to Crystal and she does so, leaning forward into a very fuckable position. The professor strokes his aged cock as he approaches her from behind and caresses her ass.

"Do you have a boyfriend?" the professor asks.

"No."

"Why not? You're a pretty girl."

"I broke up with my ex 2 months ago. He wanted to see other people."

"So you haven't had sex in 2 months?"

"3 weeks," Crystal says after a slight pause. She had to think about it even under mind control.

"Who did you fuck?"

"I think his name is Dan. He's a trainer at the college gym."

"Did he use a condom?" the professor asks, pressing the tip of his cock against Crystal's pussy lips.

"No. It was a spur of the moment thing and we just did it in the showers," Crystal responds.

"What do you think? Risk it?" the professor asks you.

You shrug. "Why not? How often do you get to get with a piece of ass like that?"

"Not nearly often enough!" the professor says, plunging his cock into Crystal from behind and she moans loudly. "Shhh! Not so loud! Keep it down while I pound you," the professor asks to Crystal and she grabs the nearest cushion on the sofa and bites onto it to stifle her moans while the professor starts to fuck her.

The professor goes slow, gradually moving his old hips back and forth and seeming to savor every moment of it. After a few thrusts, he pauses and looks at you. "This might take a while by the way," he says.

You blink and realize what he means. Given his age, even though he can get it hard and keep it there, it's going to take him a while to finish. It is kind of weird for you to watch the professor fuck someone so much younger than him, so you decide to give him some privacy.

"I- uh- I can come back in a bit. 30 minutes?" you suggest.

"Make it an hour, just to be safe. I want to take my time with her," the professor replies. He's already moving his hips again and you decide to quickly leave the office.