Speak up

You: "I can't believe this! You sneak away to fuck now? I thought you were my girlfriend, Alyssa! This is just plain cheating! What the fucking fuck!"

Alyssa: "Oh..! I..." She looks at you, her cheeks red, her nipples hard as steel, and her pussy full to the brim of another man's rock hard cock.

Alyssa: "I'm so sorry! You're right! I just wanted to get better at sex for you, I should have asked you first!"

She starts pulling Sid out, and he is clearly disappointed.

Sid: "Oh, come on, Matt. I thought you were better than this!" Alyssa is now lying next to Sid, her eyes tearing up, she tries to wipe the tears from her eyes.

You: "You're just trying to use my girlfriend, Sid!"

Sid: "That's not what this is about, Matt. Alyssa really just wanted to practice for you. What this is, is that you don't trust Alyssa to separate her feelings for you, from the lessons with me. Even though we seem like we're sneaking about, kissing, sucking or even fucking, it means nothing to your relationship." He says, propped up on one elbow, his cock glistening with Alyssa´s pussy juices.... "Besides, you can clearly see you have the power to stop the lessons at any time, but you´ve hurt Alyssa´s feelings now."

Alyssa: "He's telling the truth, he didn't come on to me or anything, I just asked for a lesson. Mostly because it's all still so new to me...I love you, Matt, the lessons with Sid have taught me that..." She sniffles and wipes her tears away.

You: "You really mean that? It's not because you don't care about me? I love you too, Alyssa. I don't want to lose you..."

Sid: "She was just practicing the cowgirl with me, would you like to see her progress?"

You: "Not really, we should empty the boxes..."

Sid: "Nonsense, Matt. You've upset Alyssa, you should show her that you're fine with her taking private lessons, even if they include penetration."

Alyssa: "I would like to show you, honey. To prove Sid really was teaching me, we weren't just fucking. That would be cheating...I would never cheat on you, baby..."

Sid: "Of course she wouldn't....you have a wonderful girlfriend, Matt. You're a lucky guy, you should trust her." He says as he starts sucking on her breast...his big, wet, erect cock just waiting to enter Alyssa again.

You: "Okay...sorry, Alyssa, I trust you, really, I do....I...I just get jealous, that's all...."

Alyssa: "I understand...just watch and see what I learned, baby!" She is her cheery self again, you must have really shaken her. You feel bad...but that stops as she straddles Sid again, lining her pussy up with his cock again...your stomach sinks...

Alyssa: "This is so much better than grinding...." She says as she sinks herself slowly on Sids cock, taking him balls deep inside her again. Then she starts bouncing up and down, her breasts jostling obscenely, Sid grabs one and massages it while Alyssa does the work.

Sid: "That's a good boy, Matt. Let your girlfriend be sexual, it's in her nature....ughhh, fuck...this is part of the reason she didn't want to to sexual stuff with you, you're so restrictive...mmmm...yeah girl, fuck that cock...."

You: "I'll try to be better...."

Sid: "That's good, change takes time. Now watch what Alyssa has learned. Show him, girl..."

Alyssa giggles and smiles, then her cheeks go fully red and she arches her back. She starts to twerk wildly on Sid´s cock, masterfully bringing her rear up and down, fucking herself, using him. It was a wildly erotic thing, and she looks to you for approval. But she doesn't stop twerking. Sid is now also moaning and grunting, doing no actual work, just enjoying your girlfriend on his big cock.

The familiar sound of flesh slapping against flesh pierces this room for the first time. You have actually never had sex in this apartment. It's fairly new to you....

Alyssa: "See what I learned for you, baby? Sid taught me, uuuunnn... he said I'm a natural...." She says through the noise of their hips slapping together.

Sid: "uuugh, fuck...she really is, Matt...fuck that's good pussy..."

Alyssa leans down to kiss Sid deeply, she's very sweaty now, that's clearly hard work. As they share a deep, loving, French kiss, Sid grabs her hips and takes over the movement. If they weren't fucking before, they sure are now. Sid is much faster, and better, than Alyssa at this movement. Sid's big, wet cock is now brutally pounding your sweet girlfriends unprotected pussy. It feels like the lesson is over now, now they just want to cum....

You start taking off your pants, you instinctively want to jerk off to the live porn happening in front of you. Sid sees this, slows down his pumping, and says: "Hey bud, remember we talked about masturbating. It´s really bad for you." He says with his cock buried in your girlfriend.

You: "I...what should I do?"

Sid: "Try to cum without touching yourself. Take off your clothes and get on your knees behind Alyssa, and get real close, so you can smell us. That will activate the part of your brain to get you hornier, making this easier."

As you get undressed, Sid keeps fucking Alyssa slowly, until you get on your knees. You lean in close, the smell is overpowering, and certainly has an effect on you. Your dick is rock hard, but you don´t touch it.

Sid: "Good boy, now watch as I fuck your girlfriend..." He says as he starts pounding her pussy again. She starts moaning loudly and with your view, you can see everything. Every inch of Sid's cock disappearing up her... unprotected pussy.

You: "Don't...don't cum in her again, please...it's not right..." Your comparatively small dick is leaking precum on the floor....beating in rhythm with your heartbeat, which is getting faster from looking at, and smelling, Sid and Alyssa´s sex.

Sid: "It's okay, Matt....uunnghhh....yeah...remember, it's still one of her safe days. "

You: "Noo... Please don't...."

Sid: "You'll come to.... ugh....like it, bud...trust me....are you touching your dick, Matt?"

You: "No...but I'm probably not gonna cum without touching it..."

Sid: "You can rub your asshole until you cum..."

You: "huh?" Alyssa looks back at you, a weird look in her eyes as she´s moaning and breathing heavily, her large sweaty breasts pressed up against Sid´s hairy chest.

Sid: "Yeah just rub your asshole or finger yourself, it works wonders."

Desperate to cum, you start circling your asshole for the first time. It does feel nice, so you keep going while Sid fucks your girlfriend.

Sid: "Lie on your back, baby, I want to cum in you deep..."

Alyssa says nothing, just slides off of Sid and lies on her back. Sid gets in between her legs, lines her cock up with her pussy and pushes in again.

Now Sid goes full throttle, fucking the shit out of Alyssa, the bed shakes and the headboard sounds like it's coming off. You keep circling your asshole for some stimulation, not realizing that your first whole knuckle is inside you.

Slap, slap, slap, slap, slap, slap, slap

Alyssa is now practically screaming: "ooOOOH....fUCK mE, Sid! mmmMMMmhhhh yeeaaaaAAAH"

Sid: "Watch me, Matt. I'm gonna come inside of your girlfriend's unprotected pussy again! Fuck it's so good! Finger yourself, come with me!"

You: "no...pull out!'

After a few moments, he inserts himself deep inside Alyssa, and you watch with excruciating detail, how his ball sack contracts again and again to deliver Sid's hot cum into Alyssa's pussy. You´re slightly amazed at the amount of spasms Sid generates almost every time, over twelve times. Every time you cum, it´s like two max three spasms.

Sid: "Gruuuuuaaaggghhh, fuck yes, take all my cum, you fucking cum slut, fuck yeah....your girlfriend loves my cum, Matt, fuck....it belongs deep inside her....doesn´t it?"

Alyssa: "mmmm.....yeeeah" You´re not sure if Alyssa is agreeing with him, or just orgasming from Sid cumming inside her. Her whole body convulses in a delicious, silent, orgasm. Her eyes are closed, she´s biting her lower lip, she´s hugging Sid´s hairy back and crossing her legs behind his hairy ass, clearly enjoying the feeling of being cummed in. "oooohmmfffffuuuuuck....." she moans. You can see her pussy massage Sid´s cum out of his cock, begging for, needing, more.

Sid and Alyssa share an intimate kiss as Sid finishes ejaculating in your girlfriend´s pussy. As they come down from their orgasm, you pull your finger out of your asshole, you were unable to cum. Sid gives your girlfriend a couple more strokes, then pulls out of her slowly, lying next to her, his cock flopping onto his thighs. Alyssa´s pussy still looks like it´s breathing from the orgasm, but now leaking with Sid´s hot cum....again....Sid props himself up on his elbow and looks at you.

Sid: "Aw, you didn´t cum, bud? See, I told you masturbation desensitizes your dick. You should be able to cum with just watching. Good thing we bought that fake pussy for you, we can start training your dick with that."

Alyssa is sweaty, breathing heavily, in the aftershocks of her orgasm. You stand up, admiring her beauty. Her magnificent breasts, rising up and falling with her breathing. Her taut, perfect stomach, and her beautiful pussy....leaking with Sid's dirty cum.

You: "I wish you didn't cum in her, Sid...."

Sid: "What's the big deal, Matt? Alyssa really likes it..."

Alyssa: "Sorry, babyyy. I just....really like the feeling..."

Sid: "Don't be the boyfriend that bans his girlfriend from the things she likes. It's one of the main things that cause good relationships to end. You guys have the best relationship I've ever seen. I'd hate to see you ruin that, Matt."

As you stand up, your cock hard and your balls blue....