[MFF] Nerdy Girl from Algebra, Part 5

[Part 1](https://www.reddit.com/r/Erotica/comments/f8yv3p/mf_nerdy_girl_from_algebra/), [Part 2](https://www.reddit.com/r/Erotica/comments/f938y5/mf_nerdy_girl_from_algebra_part_2/), [Part 3](https://www.reddit.com/r/Erotica/comments/f9hwrh/mf_nerdy_girl_from_algebra_part_3/), [Part 4](https://www.reddit.com/r/Erotica/comments/falcyg/mf_nerdy_girl_from_algebra_part_4/)

*for maximum impact, I urge you to read the other parts first*

—

I feel her tongue flicker against my ear lobe as she whispers into it, “Well, nod if you understand?”

I feel her grip on my balls tighten as she says it. She wants the answer she wants, and I wonder deep down if I even could give her anything else.

I wonder why she’s choosing to whisper so suddenly, she had been bold and brazen and bitchy when she commanded seconds earlier that I bring her to my girlfriend.

*Girlfriend.*

That’s the hesitance.

How, if I go through with this, will that relationship not change forever?

But then, last time I went to the kink zone with this stranger it changed my relationship with Kathy very much for the better.

I nod.

I feel her smile before she whispers, “Good boy.”

Then she removes her hand from my balls, uses it to take me by the hand and walk with me out of the building.

As we walk she asks if I know where to find “the whore” and I nod.

She commands me to “lead her to the whore” and I nod and I do. Never once daring to contemplate what Kathy’s reaction will be when I show up to our date with this stranger.

*

Our date was at the school’s main bar / restaurant, so it’s a short walk. Kathy is already there and seated, I see her as we enter the place and I simply point.

The girl beside me smiles and licks her lips. I catch it out of the corner of my eye as I look at Kathy sitting at the table. Kathy’s short skirt rides hide up her thighs showing off her killer legs, her top reveals just enough of her ample cleavage to generate excitement, and her beautiful and pretty face smiles as she sips on her drink with her sexy full lips.

The girl beside me says what I’m thinking, “Ohhh, she’s pretty. I’m going to really enjoy this.”

She leads me over to the table. It’s a table for two though and she takes my seat, leaving me standing beside the table.

Kathy does a double take, from me, to the girl, and then back to me again. Her jaw hangs open a bit, her eyes scrunch up with what seems as much confusion as it does a sudden tich of anger.

Kathy starts to say, “Who the hel…” when the girl cuts her off.

“Do not address him, speak to me only.”

Kathy slowly turns her head and looks her sudden rival in the eyes, then tries again, “Okay who in the hell ar…”

And of course the stranger girl does it, her go-to move, she leans across the table and places her finger on Kathy’s lips to silence her.

It works, but maybe not for the reason the girl believes.

Kathy does go silent. Dead silent.

And I know it’s because she realizes all at once where I got that move from. I see Kathy’s eyes go wide. I don’t dare guess what she’s thinking. I pray it’s something that does not kill my future with her.

The girl removes her finger from Kathy’s lips and sits back and with her devilish grin says, “Now finish your drink and take us back to your room whore. I’ve got plans for the both of you…” and ends it with, “Nod if you understand?”

And again my heart sinks, I’d stolen those exact words and used them on Kathy that first time I dominated her.

And I know Kathy realizes it as her mouth almost unhinges, she literally sits open mouth, staring straight ahead. She now knows this other girl was my puppet master, maybe not to what extent, but all at once she’s aware that the three of us shared a bed many times in the past, even if only two of us where there in the flesh.

I can feel the weight of this on Kathy; I can almost see it. I feel it myself. The moment is an eternity as I simply hover over them beside the table. I feel faint as I wait for Kathy to respond – to do or say anything.

Finally Kathy’s lips come together, and I hear and see the faintest, “okay” escape from them.

She nods.

The new girl’s face seems to explode with joy.

Kathy pulls the straw from her drink and tosses it on the table, then downs what is left in her glass in a single chug, then slams it down on the table. She pulls a 20 from her purse and drops it, then stands up.

She finally looks me in the eyes. It’s a strange look I can’t pinpoint, almost certainly a mix of something that includes a high concentration of disappointment. And I can feel her heart beating. I want to explain but I don’t know what to say.

The girl at the table answers for me, “Oh don’t worry whore, he didn’t plan this, I just sort of showed up… he can be yours and yours only again tomorrow, if that’s what you really want.”

Kathy’s expression finally lifts, she doesn’t smile, but it’s obvious that statement did something for her.

The new girl stands up and says, “Alright, to your whore’s den… this has been more than enough foreplay, don’t you agree?”

Both Kathy and I nod. I almost want to laugh at this but don’t dare it.

*

We walk in silence in single file to Kathy’s room.

Kathy leads, and I trail. The new girl is in the middle and I observe her enjoying the beautiful little show one gets from watching Kathy’s ass as she glides gracefully from place to place. I’d seen it before. I truly wonder if the new girl is dreaming of how that ass will taste. My erection starts to stir as I finally go from the emotional conflicted mess I was when these two objects of my lust first came face to face, to the horny bastard who realizes he’s going to get to fuck the shit out of both of them in some yet undefined way.

Once the door to Kathy’s room is closed and locked behind us the new girl wastes no time.

“Clothes off. NOW. Both of you.”

We both do as we are told. Sneaking small glances, our eyes meet, and Kathy seems to have that gleam of nervous excitement she always takes on before we’ve explored any virgin territory.

The girl points to Kathy, then to the little rolly desk chair, “Sit,whore.”

I remember what the stranger did to me in her own desk chair. My cock twitches.

Kathy sits.

The nerdy girl reaches to her jeans, and I notice that instead of a belt she has a long, thick piece of cloth, and where a buckle would be it is tied in a large bow. She stares Kathy in the eyes as she undoes the bow and pulls the strip of material from the loops in her jeans. She holds the long cloth before her and snaps it in her hands. She bites her lip, another of her signature moves.

I just watch the scene unfold.

The girl walks toward Kathy, holding the “rope” in one hand. She gently caresses Kathy’s cheek with the back of her other hand, and I’m surprised and excited that Kathy doesn’t bat an eye at this. She leans into it.

Had she been with a girl before?

All at once the nerdy girl pulls her hand away from Kathy’s face, before violently rocketing it back into and through her cheek, slapping Kathy hard across the face.

The nerd dom laughs.

Kathy’s head is hung, she breaths heavy, but then her face springs back to attention. A slight smile on her mouth now, her cheek noticeably redder. She closes her eyes and seams to lean her head back in ecstasy. I notice her hand is now buried in her crotch and she’s rubbing her pussy gently.

We’d played with pain but nothing to this level. I had no idea how much pleasure Kathy drew from it. It was intoxicating.

The girl slaps her again. And Kathy didn’t even open her eyes, she just moans as she brings her head and face back to neutral.

The girl raises her hand again. It’s as if Kathy could sense it, she rose her cheek toward where the blow would come from. Almost hungry for it. But the blow doesn’t come.

The girl just stood over her smiling like the demon she was. The ultimate cruelty was not to deliver the pain in this case.

She laughed and said, “Whore, get your hands out of your hungry little cunt and put them behind the chair.”

Kathy opened her eyes. She made eye contact with her strange mistress, then nodded as she knew she should.

Kathy put her hands behind the back of the chair, and then used her feet to spin the chair around. She knew what her mistress wanted to do. And she was obviously eager.

The mistress dropped to her knees, then lifted the cloth belt and used it to tie a tight loop around one of Kathy’s hands, then threaded it around the back of the chair a few times, and finally bound Kathy’s other hand. In less than a minute Kathy was going nowhere except deeper down this rabbit hole.

The girl stood, spun Kathy around on the chair, then when she was sure Kathy was watching, proceeded to slowly strip her own clothes off.

“So whore, now is your one choice. You may speak, tell me…”

And she reaches down, between Kathy’s legs. Pushes a finger against Kathy’s pussy lips, wiggles the tip a bit so it spreads and disappears between them, then thrusts it up into Kathy’s depths, hooking it, curling her finger inside the soaked hole of lust. The mistress never breaks eye contact as she digs into her new little whore.

“So, your pussy?”

And she reaches down with her other hand and does the same trick on her own pussy. Fingering them both simultaneously for a moment, before pulling the finger from her own pussy and immediately using it to trace around Kathy’s lips, painting her pussy juices all over them like lust lipstick.

“Or my pussy?”

Kathy doesn’t answer immediately, so the mistress pulls her hand back once more and slaps Kathy again. Kathy moans at both the punishment and the finger still working its way inside her.

“Your pussy or my pussy? Pick one you whore.”

I realize for the first time, I’ve been jerking myself as I watched the private show, just a fly on the wall to that point but I wouldn’t have cared if that’s all I remained. This was the hottest show I’d ever witnessed, and it was only getting started.

She slapped her again, and again. Back and forth now. All the while she fucked her with 2 or 3 fingers now and Kathy just relished in the pain and the pleasure mix. I heard her distinctive orgasm moans that I knew so well.

Finally the Mistress stopped the slapping, and stopped the fingering. She pulled her finger out of Kathy, and sucked on it like it was candy while she stared into Kathy’s eyes.

The answer finally came, “Your pussy.”

The mistress smiled, she dropped to her knees before Kathy.

Kathy looked confused as the mistresses tongue painted a long slow stroke up Kathy’s inner thigh and then buried itself deep inside her depths, replacing where her fingers had been. She attacked the pussy with her mouth, her tongue running up and down the folds, over the clit, back down over the slit again and again.

Kathy moaned, and through her moans repeated, “Your pussy.” She moaned.

The mistress dug her tongue in deeper, fucking it in and out of the hole now.

Kathy moaned again, “Your pussy, I said your pussy, I want to eat your pussy now. Please.”

She begged, the mistress was not giving her what she asked for, but really Kathy had not understood the question.

The mistress finally relented and laughed, “Oh you stupid whore, it’s my pussy you decided on alright, but what you were deciding was where your boyfriend over there’s cock was going to go.”

And for the first time this entire time, the mistress looked at me.

And for the first time this entire time, the Kathy looked at me.

The mistress had the smile I expected.

Kathy had her first look of true jealousy. It was obvious that was not what she would have chosen had she known.

The mistress said to me, “Get behind me and put that cock in my pussy like I know you’ve wanted to since that night in MY dorm room.”

Kathy looks crest fallen.

The mistress urges, “Fuck me now, and fuck me hard. Do it.”

In for penny, in for the pound.

I do as I’m told. I am kneeling behind her in no time. She adjusts and is on all fours. And as soon as she is, even before I’m inside her, her face is buried back between my girlfriend’s legs.

Kathy’s eyes almost have a split personality – the lust and the envy are both there at the same time. They half role back in her head as the Mistresses tongue resumes its assault, and then she sucks hard on Kathy’s clit.

My cock almost bursting in my hand I finally push the head against the pussy of the mistress. And as I do I see Kathy’s eyes locked full on mine now. She watches as I proceed to carry out what really was her wish. She had said, “Your pussy.”

Her eyes plead with me, both not to do this and betray her, and to please do this so the cunt hungry animal working on her pussy won’t stop.

I say, “You asked for this.” And I push my cock full into the mistress.

A primal moan is released from the mistress’s mouth right into Kathy’s pussy. Kathy moans in turn.

I grab the hips before me and start to slam hard into this dirty mistress. To work my lust into her pussy with each thrust. Her pussy feels good and tight and wet and hungry, just like the rest of her.

Kathy is watching me now, all the envy gone just interested lust remaining. Because every thrust makes the woman eating her works all the harder.

The mistress barks at me, “Put the whore’s legs over my shoulders”

I know at once what she is going to do, and Kathy doesn’t know. The knowledge is nice, it is power, it is intoxicating. I do as I’m told.

This lets the woman slide her tongue up and down Kathy’s length as before, only this time, she doesn’t have to just stop at the slit and can drive it further down. I no longer watch Kathy’s eyes, I watch the mistress go after her prize.

I hear Kathy panting as the mistress starts to dance her tongue ever closer to Kathy’s ass. Soon, she’s buried her tongue up into that asshole and both of them moan.

I moan. I fuck the mistress’s pussy in time with the tongue fucking my girlfriend’s ass.

Who knows how many orgasms they each have, and who knows where they are truly sourced from. It’s primal, we are a bunch of wild animals mixing lust and anal and pleasure and pain and bondage and domination into a tight and sweaty package.

Who knows how many orgasms they have but I near my first one, the one that had built from that day in the nerdy girl’s dorm room, when I was the one tied to the chair.

The girl I fuck senses it. It’s fitting, she had read me like a book this entire time, this was just going to the final time.

She pulls her face from Kathy’s pussy, then crawls forward so that my cock is naturally pulled from her pussy.

I stand up out of instinct and look down as the mistress gets up on her knees and kisses Kathy hard on the lips. A passionate last kiss that tastes of pussy. Kathy seems eager for this, but the mistress pulls away.

She says, “Now watch his eyes as I suck his soul of out his dick you whore, I’ll show you how a man like him deserves it.” She slaps her once on the face, gently though, playfully, since Kathy’s pleasure is now abruptly halted.

The mistress spins around and hops on her knees once and lands right before me.

She grabs my ass with each of her hands and pulls me toward her mouth. She aims it right for the head of my cock and I disappear between her lips, they close tightly around me as she fucks me with her mouth. She thrust just as her hips had thrusted against me moments before.

I look Kathy deep in the eyes as I unload my cum deep into the throat of the mistress.

Kathy mouths the words, “I love you.” as my heart, mind, balls and soul all explode in unison.

—

THE END

Source: reddit.com/r/Erotica/comments/fb5ji5/mff_nerdy_girl_from_algebra_part_5