I'm not putting Sid's cum in my mouth...

Disappointed, Alyssa stands up, Sid's cum leaking down her tits, stomachs and inner thighs. "Suit yourself...I thought you would want me." She sighs.

You: "I do want you...it's just..."

Alyssa: "Forget it..."

Your girlfriend then exits the room, naked, covered in another man's cum. There's no chance the roommates didn't see her. You think you can hear some whistles...

Sid: "You should have let me fuck her, bud. Now she's disappointed with you." He says as he rubs the head of his massive cock, massaging the rest of the cum out of his cock onto the bed.

You: "I just can't stand the thought of you... doing that...with my girlfriend."

Sid: "You just have to get used to it, I'm certain that you can do it..." Sid is laying flat on his back, still massaging his cock.

You: "I don't think so..."

Sid: "I like you, Matt. So I would hate for your relationship with Alyssa to end, because of your weird jealousy...Alyssa needs to experiment and learn, sexually, with me. If you keep denying her, she's going to resent you for it."

You pause for a second, would Alyssa really break up with you because of this? Are you being unreasonable?

You: "I...don't want to lose her..."

Sid: "Don't worry, bud, I'm here to help you, remember? You need to become more comfortable with Alyssa and I being sexual. That way you can keep your girlfriend, and even marry her in the future. Kids and a white picket fence and all..."

You: ".... how?" You say to the naked, hairy, homeless man on your girlfriend's bed. Sid seems to speed up the massaging of his cock.

Sid: "It´s simple, we keep doing the lessons. But this time we won´t be sending you everything. Now you have to show how much you trust Alyssa...."

You breathe a little lighter, you expected Sid to force you let him fuck your girlfriend. You´re glad it´s just more fooling around.

You: "o...okay..."

Sid: "...and you can´t masturbate anymore." Your eyebrows raise in shock at this, surely he can´t be serious.

At that moment, Alyssa walks back in, her big naked breasts bouncing in lockstep with her stride. She seems no longer concerned with her male roommates seeing her naked. At least she´s washed Sid´s cum off her gorgeous body. "What are you guys talking about?"

Sid: "I was just suggesting to Matt that he should stop masturbating. It messes with his ability to connect with you on a more sexual level. As well as, Matt has agreed that we take the lessons further on our own, without his involvement as much. That way he can show you how much he trusts you..."

Alyssa: "Oh...that´s probably not a bad idea..." She says as she walks to the bed, and joins Sid, cuddling him in the nude. "Maybe he would want me more, if he was hornier?"

Sid: "Exactly, I think he has a real problem, because who wouldn´t want you?"

Alyssa: "You´re so sweet..."

Sid and Alyssa lock eyes lovingly without even acknowledging your presence. Then they kiss, like lovers, softly. Alyssa´s beautiful, supple lips touching Sid´s gross, dry, man lips. Sid starts massaging Alyssa´s large, beautiful breast, while she takes over massaging his cock. The kisses get more lustful, more intense as time goes on. You are scared to intervene, after what Sid just told you. Maybe you are too jealous.

After a while of them making out and fooling around, you clear your throat to try and stop them. "Maybe we should go home now, Alyssa?"

Alyssa breaks the kiss, a string of saliva still connecting their mouths. "I haven´t cum yet, baby...."

Sid: "Don´t be selfish, Matt. Alyssa is the only one that hasn´t cum....pull your pants up, don´t want to risk masturbating again."

You look down, only now realizing your cock has been exposed this entire time, your cum pooling in your underwear. You feel gross, but you obey, pulling the wet underwear over your hard dick.

Sid and Alyssa started kissing deeply again, but now Sid´s hands are travelling down....to Alyssa´s shaven pussy. She parts her legs immediately for him, showing no resistance at all. Sid starts rubbing his fingers expertly on your girlfriends pussy, making small circles. Alyssa starts moaning into his mouth, while jerking him off slowly.

After a while, Sid moves into position, and inserts a couple of his fingers into your girlfriends slick canal, penetrating her for the first time. Alyssa breaks the kiss in shock: "Oh...my god!"

Sid: "See this, Matt? I´m hitting her G spot here, she is really sensitive at this spot here. So I can curve my fingers like...this..."

Alyssa convulses slightly as Sid´s fingers move inside of her pussy, and she starts breathing heavier. At least Sid is teaching you something now, for a change.

Sid: "I´m betting my cock would hit that spot every time....us having sex....would be divine, don´t you think, Alyssa?" Sid says while he moves his fingers inside your girlfriends pussy in a rhythmic manner.

Alyssa: "mmmmm....yes...yes....yes...I want your big cock inside me...."

Sid: "That´s right, this pussy was made for me....you´re never going to let Matt take your virginity, are you?" His fingers are moving faster now.

Alyssa says nothing for a little while, just moaning and breathing through her mouth while looking at you with this homeless guys fingers in her pussy. Sid stops moving, and pulls his fingers out, Alyssa seems very disappointed. "I´m not gonna let you cum unless you say it..."

You: "W...wait, I..."

Alyssa: "Yes! Yes...I´m never gonna let Matt take my virginity....please make me cum..."

"Good girl..." Sid says, inserting his fingers back in her pussy, ready and waiting. His fingers start moving quite fast now, Alyssa starts moaning instantly. "oohhmmmmm!"

Sid: "Why aren´t you gonna let him take your virginity, Alyssa?"

Alyssa: "I need....a man´s cock!"

Sid: "That´s right....who has what you need?"

Alyssa: "You!" Sid´s hand is a blur now, your dick is rock hard under your jeans, sloshing around the small load of cum you shot out earlier. You are in total shock, but you wish you could jerk off right now.

Totally unprompted, Alyssa keeps going: "His dick is too small, I wouldn´t even feel it! uugghhhmmm....."

With that, Sid rewarded her by letting her cum, he kissed her, letting her practically scream into his mouth while her thighs clamped Sid´s hand, keeping him lodged in her pussy. After a while of Alyssa and Sid enjoying the throes of her orgasm, you speak up.

You: "Alyssa, I..."

Sid: "Don´t worry, Matt. We were just saying those things to heighten Alyssa´s experience. It was easier that way to make her cum."

Alyssa: "Yeah....sorry baby, I didn´t mean it, it just....helped for some reason."

Sid: "It´s totally natural"

You: "...oh...o...okay..."

Alyssa rose up slightly, and started lovingly sucking on Sid´s cock, which at this point is just leaking precum again. Sid moans: "Thaaat´s a good girl..."

While your girlfriend sucks Sid´s cock, he says: "I think it´s getting too late for Alyssa to go home at this point....do you mind if she just stays over?"