Click here to read the previous parts of the story.

Your beautiful wife has been working out more and more since she met her new friend. It's not just running. She goes to the gym regularly, too. She works her entire body because she wants to look good for him, and because it seems that they can't help but get turned on when they work out together.
You can see the results. Her body looks lean and sexy. She's more confident, too. She wears tighter - and often skimpier - clothes. It's not just the way she dresses, though. She exudes confidence every second of the day.
That confidence is obvious in your marriage, too. She knows she's in charge now. She knows that you're an eager submissive for the more dominant version of your wife. She knows that you'll do whatever she says, whenever she says it.
That's why you didn't put up a fight when she invited her lover to spend the night. You didn't say a word when she told you that you'd be spending the night in the guest room. She rewarded you for your submission, too. She let you watch him fuck her in your bed. She let you suck his cock clean afterwards. She let you feast on her pussy. She even let you worship her ass while she rested her head on his chest and told him that he fucks her better than any man - including her husband - ever has.
You were rewarded again in the middle of the night. They had loud, vigorous sex a little after 3 a.m. You woke up to the sound of the bed frame creaking from his hard thrusts. Your wife's moans of pleasure filled the house. Your dick got hard as you listened and imagined him fucking her from behind, as she seemed to enjoy that position more than any other with him.
When they'd finished your wife joined you in the guest room. She had you get out of the bed and onto your knees. She let you kiss her ass and lick up the sweat that she'd built up from the vigorous sex, which meant she'd probably ridden him. She let you spread her cheeks and press your face between them. She let you lick her asshole, cleaning up every delicious drop of sweat like a good little bitch.
Then she fed you his cum, offering you the reward you've come to crave more than any other. She sat on your face and let you probe her pussy with your eager tongue, licking up every drop of his sticky, salty seed in the process. She let you completely clean her and then she took your cock inside her for a few beautiful moments. She didn't fuck you, though. She didn't think you deserved to fuck her. Instead, she teased you with her pussy. She let you feel it for just a few seconds and then got up, told you not to masturbate, and left the room to go back to him.
Now it's the next morning. It's a little after 8 a.m. You're in the kitchen brewing a pot of coffee so your wife and her lover won't have to wait when they get up. The taste of your wife's pussy - and her lover's cum - still lingers on your lips from the night before. You could wash it away, but you prefer to be able to relive the experience of her riding your face whenever you lick your lips.
Your wife enters the kitchen without her lover in tow. She smiles, gives you a soft kiss on the cheek while caressing your face, and pours a cup of coffee.
"How did you sleep?" you ask.
"Aside from that little middle of the night interruption?" she replies with a knowing smile. "I slept like a baby. I spent most of the night in his strong arms. I could feel his body against mine. I could feel his cock pressing into my ass. It was nice sleeping next to the strong, gorgeous man that satisfies me in ways I never imagined were possible."
Your wife looks down to see that your cock has come alive. "Does that excite you?" she asks while stepping closer and reaching down to play with your dick through your underwear. She sips her coffee and stares into your eyes.
"Yes," you admit.
She works your underwear down and takes your semi-stiff cock into her hand. Her skin is warm and impossibly soft against your shaft and when she gently plays with your stiffness, an intense kind of pleasure works its way through your body.
She gathers the precum from the tip of your cock and lifts her fingers to your lips. You take them in your mouth and you suck, just as your wife wants you to do. She smiles and pushes her fingers to the back of your throat. For just a moment your gag reflex is triggered and your eyes water a little, but you manage to get it under control. You manage to suck like a good boy for her, because being a good boy is what thrills you more than anything.
"You know I love it when you suck for me," she says softly.
You nod with her fingers still in your mouth.
"Put your hand into my panties," she instructs. "Feel how wet you're making me."
You slip your fingers into her panties and between her pussy lips. She smiles as you feel her heat and wetness envelop your flesh. You can't help but think of being inside her, of fucking her, of your cock experiencing the same pleasure your fingers are feeling.
"You want to fuck me, don't you?" she asks. You nod and your wife smiles. "Are you willing to earn the right to enjoy my pussy?"
You nod again and her smile turns decidedly devilish, as if she planned out this little interaction to led you right to this spot.
"Go to the bedroom," she says. "Wake him up with your mouth. Suck his cock for me. Suck his cock until he's hard, until he's filling our bedroom with moans of pleasure. Suck his cock until you can taste his sweet, delicious precum on your tongue. Show me that you're every bit the good little suck slut I've trained you to be. Do what I desire and you'll be a little bit closer to enjoying my perfect pussy."
She pulls her fingers from your mouth and you pull yours from her panties. You know what she wants you to do, but you hesitate. It feels strange to blow another man in your bed, especially since it seems like your wife won't be joining you. It will be just you and him. He'll be on the side of the bed you sleep on. You'll have his cock in your mouth, the cock that's fucked your wife to so many orgasms.
"Go," she says. "Be a good suck slut for me. Get him hard. Get him moaning. When you do, I'll join you."
You turn and slowly leave the kitchen as you try and gird your courage to do what your wife desires. Your heart begins to pound as you near the bedroom. You push open the door and see him sleeping with a thin sheet over his body. You see a bulge between his legs. His cock appears to be half hard already. You just need to get it the rest of the way there and your beautiful wife might let you inside her.
You step into the bedroom. You tiptoe towards the bed. You slowly pull the sheet aside. You stare at his body and you feel a rush of arousal at the idea of your wife and her lover sleeping together without a stitch of clothing between them.
You move to the foot of the bed and slowly crawl between his legs. You reach his cock and stare at it. You've blown him countless times before - you've sucked to make your wife happy - but this feels different. It feels scarier. Your heart is pounding impossibly hard, partly from fear and partly from a kind of arousal you don't really understand.
You take a deep breath and consider backing out of the bed and leaving the room. Your wife will forgive you. She probably won't let you fuck her and she'll be disappointed in you, but she won't be mad.
You won't have made her happy, though. You won't have served her needs. You won't have offered your submission. You want that. You want to submit. You want to make her happy. You want to be a suck slut for her.
You take the head of his cock in your mouth. Your tongue swirls around it. You suck gently. He stirs, but he doesn't wake up. He moans softly and you feel him get harder in your mouth as you swallow the entirety of his semi-stiff shaft.
"Good morning," he says.
You look up and see a confident smile on his face, and with good reason. He's in a married woman's bed and that woman's husband is busy sucking his cock because that's what his wife desires. He knows your beautiful wife ordered you into the room, ordered you to suck cock for her, ordered you to get him hard because that's your place as her submissive husband.
That confidence leads him to reach down, put a hand on the back of your head, and fuck your mouth. He keeps a tight grip of your hair and pumps his big dick in and out of your throat. You gag, but he doesn't give a damn. He's having fun using you. He's moaning, too, and moaning loudly. You know it's reverberating down the hallway. You know your wife can hear it. Your throat is already starting to hurt, but you're not going to stop him. You won't. You can't. You don't even want to. You just want to make him feel good because that's what your wife demanded.
"Good morning," you hear her say. "I see that my husband is doing what I sent him in here to do."
"Damn right he is," her lover says. "He's doing a good job of it, too. Am I going to get to enjoy that married pussy of yours?"
"I'm afraid not," your wife replies. "You know I hate to pass up on the chance to enjoy your beautiful cock, but you fucked me so hard last night that I'm a little too sore this morning."
"Should I cum down his throat?" he asks. "Or on his face?"
"I had something else in mind," your wife replies, leading to a sudden sense of anxiety as you wonder what she could possibly have in mind. "I was thinking you could fuck my husband. I was thinking I'd tell him to get on his hands and knees for you. I was thinking I'd tell him to reach back, spread his ass cheeks, and beg you to fuck him like the little bitch he is."
"I'm down for that," her lover replies.
"Then get your greedy little mouth off his cock and get on your hands and knees," your wife demands of you.
You pull off his cock. You look over at her and see that she's stripped and is leaning against the bedroom door and playing with her pussy. She's taken one of her utterly flawless breasts in her hand and is playing with it while she masturbates. You can hear how wet she is. It's because she wants to see you get fucked.
You get on your hands and knees facing your wife. She smiles. "How nice," she says. "You knew I wanted to look in your eyes when he fucks you."
He moves behind you. He spits on your asshole and uses the head of his stiff cock to rub it all over. You reach back and spread your ass cheeks. "Please, fuck me," you say, doing as your wife desires. "Fuck me like the little bitch that I am."
He laughs and pushes his cock inside you. He fills your asshole. You grit your teeth at the pain, but your wife moans. She finds pleasure in watching her husband get fucked, and that turns you on.
He grabs your hips. You release your ass cheeks. You don't need to hold them open now that he's inside you. You put your hands on the bed and lift your body. You look up at your wife. She stares into your eyes as pleasure washes over her face. She slips three fingers into her pussy and pounds her slippery hole hard and fast. She pushes away from the door and pulls her fingers from her cunt. The moment she reaches the bed those fingers end up in your mouth. She puts a hand on the back of your head and fucks your face as he fucks your ass.
"That's a good little bitch," she says. "Take it from both ends. Take it for me. Take it like the slut you've become."
You take it like a slut. You suck her fingers. You take his cock up your ass without hesitation. You let them use you from both ends. You offer your complete and total submission, and in doing so you experience a sense of bliss like never before. You feel it through your entire body. It's like you're tingling from head to toe. It's perfect.
She pulls her fingers from your mouth. She plunges them back into her pussy. She sounds wetter than before, like her cunt drips just a little more each time his cock fills you. Her slippery fingers end up in your mouth once more. She pumps them in and out and reaches down to masturbate with her other hand. She can't seem to pass up the chance to pursue her pleasure while she watches her husband get fucked.
"Where do you want me to cum?" he asks.
"Inside him," she answers. "Cum in his whore ass. Fill him with your load. Give him what every good little bitch wants. Give him a real man's cum."
He fucks you harder. Your wife pounds your mouth harder. That sense of bliss you felt gets stronger. Your cock is stiff. He's hitting a spot inside you that feels so much better than you thought possible.
You moan around her fingers as it suddenly feels like you're going to cum. She responds by fucking your mouth faster and deeper. You gag on her fingers, but she doesn't stop, and that sense of pleasure between your legs continues to grow.
Your loins tighten up as he fucks you with incredible speed and power. For a moment the whole world slows down as you concentrate on that intense pleasure that happens right before you cum. Then you cry out around her fingers and orgasm. You cum all over the bed with another man's cock in your ass and your wife's fingers pumping your mouth.
She cums too. You're not sure if your orgasm prompts hers, but in the moment you hope it's true. You listen to her moans and watches the juices drip from her pussy and slide down her thighs.
He buries his cock inside you. He grunts and groans and gives your ass a hard smack. He's cumming inside you. He's cumming in your ass. Your wife and her lover are cumming after using you like a slut. You've never felt more submissive.
Your wife pulls her fingers from your mouth and drops down until she's staring into your eyes. "Did you enjoy that?" she asks.
You nod.
"Because you like doing as you're told? Because you like submitting to me?" she asks.
"Yes," you admit.
"Good," she replies with a smile. "Because I can't go back to the way things were. I can't go back to being a normal wife. I need you to be a good little bitch for me. I need you to be a suck slut, to always do as you're told. Do you understand?"
"Yes," you say. "I'll do as I'm told."
You will, too, because you've learned that you like being submissive. You've learned that you love having a more dominant wife. That's what truly makes you happy. Luckily for you, she's only getting started.
The End.