So horny, and a Sweaty Chase smells so good... I can't leave just yet.

You clean up a bit and change into a hot-pink body-con dress (short and with your tits spilling out), and you spend the rest of the afternoon with Chase analyzing tennis video of his competitors. His mother has him explain everything to you, and you ask a lot of questions. It involves a lot of slo-motion, rewind, and pause and resume. You begin to see the game as he sees it, seeing how players protect their weak spots, where they go after hitting a shot, when they make choices between the aggressive, risky play and the safe, mostly-safe choice, and how, over a long volley, players try to gradually work each other into uncomfortable positions and how they recover.

Finally, after dinner, the day is over. Chase goes to bed early, leaving you and Mrs. Chamberlain alone.

"Come here," she says.

You walk over and stand in front of her, fidgeting, not knowing what to do.

She does something on her phone and the vibrator, which had been quiet ever since you gave Chase his blowjob, buzzes to life.

"Oh!" you gasp at the intensity. "I want to suck his cock!" you repeat, as instructed, now practically automatic.

"That's my good girl," Mrs. Chamberlain says. "Come closer."

You step closer. She grasps the hem of your stretchy, body-con dress and pushes it up a bit. Reaching underneath she finds the plastic humming bulge in your crotch and presses on it with her finger.

"Ohhhh..." you moan, your knees going weak.

"That's it," she says, looking you in the eye. "You're a hot and horny one, aren't you?"

You suck in your breath and don't answer, as she works the vibrator into your cunt.

"I asked, you are a hot and horny girl, aren't you?" she says, this time more demanding.

"Yes!" you gasp.

"Yes what?"

Oh god.

"Yes, I am a hot and horny girl," you admit as she rolls the buzzing plastic device into your pussy. It is delicious ****.

"And you're a good and obedient girl who does what I tell her to do, aren't you?"

"Yesssss..." you hiss, through gritted teeth. I MUST NOT COME IN FRONT OF CHASE'S MOTHER, the thought runs through your head. "I am a good and obedient... UH... girl... UHHHHHH... who does what you tell me to do."

"This is all for Chase, you know," she says. "He's strong, quick, agile, quick thinking and smart. He has everything he needs to be a number 1 tennis player... except motivation. That's why you're here, dear. You are his motivation. Do you understand? This is why you have to obey me in absolutely everything. This is why you have to wear the chastity panties. This is why you have to dress sexy and wait on him at all times. Do you understand? YOU are his reward."

"I... Oh god... meeee??"

"Yes, dear, you. That's why you can't have sex. Not until he achieves the next level. Not unless he gets to the semis of the US Open. That's our next goal. You are his motivation. You will be what he is pursuing. Your pussy is his reward."

"Please..." you whimper.

"You need to be horny, and sexy, and ****... for Chase. But I know horny, sexy, slutty little girls like you."

"I'm not--" you start to protest.

"Oh, please. Of course you are. You are a SLUT. All you want is COCK. I see how you look at his bulge. If it weren't for the chastity panties, you'd be fucking Chase right now, I'm sure. Yes, I know how horny sluts like you think, believe me. And I know you can't go for too long without cumming before you loose your mind. So here is what I'm going to do. I will ALLOW you to keep seeing Chase. I will ALLOW you to keep being his hot, gym bunny girl-friend. I will ALLOW you to keep serving his every need..."

"Allow me? But--"

"Yes! Allow! It is your privilege! Chase is hot, ripped and a sex god, is he not? With a nice big COCK. No need to blush, my dear. I see you staring at it, your mouth open, practically drooling. Yes, I will ALLOW it, but you need to give me something."

She fiddles with her phone and the vibrator starts to hum even more aggressively.

"I... oh fuck!" You are practically on the edge now. You try to squirm away, but she grasps your ass with one hand and holds you in place while continuing to work the vibrator over your clit with the other.

"But you must give me something!"

"Give you something...?"

"Yes! You must promise to obey me! Say it!"

Oh god, are you really going to do this? Are you going to promise to obey your boy-friends MOTHER? She could be your future MOTHER-IN-LAW? Are you really going to turn over your life into her control? Let her tell you what to do? Wear her chastity panties?

Is this what you're going to do? Give in? To her? Obey her?

"I promise!"

Apparently so. You are a horny slut, aren't you? Standing there with your dress pulled up and an older woman getting you off with a vibrator as she dominates you. You are horny, submissive slut.

"You promise, what?" Mrs. Chamberlain demands.

"I promise to obey you," you say, defeated now, **** to cum. Please let me cum! you think.

"Promise that you will do exactly what I tell you to do, without question!"

"I promise to do everything you tell me to do, without question. I promise!"

"Give me control of your orgasms, so that you can not cum unless I allow it. Promise me!"

"I promise that I will not cum unless you allow it."

"And Chase too! Promise me that you will not help him cum, unless I approve of it!"

"I promise! I promise. I will only give Chase orgasms that you allow. I promise!"

"Very good, my dear," she says. Standing up, Mrs. Chamberlain puts one hand around your head and pulls you into a hug, your face in her shoulder, as her other hand presses the GOD DAMN VIBRATOR into your pussy, working it in deep and HARD>

"You may cum now," she says, softly in your ear.

With a keening scream, your orgasm washes over you. Mrs. Chamberlain hugs you tight as the pleasure erupts in your body, making your nipples tingle, toes curl, and hair sweat. You shake as she expertly brings you to a SECOND orgasm, whimpering and jerking in her arms.

It takes you minutes before you come to your senses, shivering and wasted. You are a soup of pleasurable endorphins, and feeling like you'd march to the ends of the earth for this woman who now controls your fate, and Chase's.

And then you look up and see Chase, peaking out from his door down the hall...

... staring at you.