Underage Marilyn's Sister Kate Gets Mouthy

by Steven Seven

Caution: This Erotica Sex Story contains strong sexual content, including Ma/Fa, Ma/ft, ft/ft, Fa/ft, Consensual, Mind Control, Slavery, BiSexual, Heterosexual, Incest, Sister, DomSub, MaleDom, Humiliation, Group Sex, Harem, Anal Sex, Analingus, First, Oral Sex, Scatology, Water Sports, Big Breasts, Small Breasts, .

Desc: Erotica Sex Story: Kate is a petite, blue-eyed blonde with a pretty face, a tight but shapely ass, and the same milky white skin as both her sisters. In this sequel to "Underage Marilyn Takes It Up the Ass" where the Master enslaved his teen sister-in-law Marilyn, he now enslaves teen sister-in-law Kate. This story is from my serial "Enslaving My Wife and Her Sisters" Ch 3. It's about a college student who gets unlimited wishes from sexy spirit Anastasia. He wishes to enslave his teen sister-in-law Kate.


Kate is a petite, blue-eyed blonde with a pretty face and a tight but shapely ass. Kate has the same milky white skin as both her sisters. This story is a shortened excerpt (reduced by about one-third in length) from Chapter 3 of my ongoing serial “Enslaving My Wife and Her Sisters” which is my most-downloaded ongoing story to date. What’s that serial about? It’s about a college student named Steven who finds a book enchanted by a spirit named Anastasia. She offers him a choice: either three wishes, or unlimited wishes. What’s the catch? For unlimited wishes, he must become her consort, and he’ll slowly become a sorcerer. What’s the attraction? All the women and sex and anything he wants. What’s the downside? The more magically powerful he becomes, the less he’ll fit into the mundane world.

This is a shortened adaptation from Chapter 3. To read the complete chapter, go to “Enslaving My Wife and Her Sisters.” This chapter is the sequel to the shortened adaptation of Chapter 2 which is titled “Underage Marilyn Takes It Up the Ass.”

I’m Steve. My big-breasted wife Gloria has two younger sisters who were always hanging around our apartment. Kate was 17 and Marilyn was 14. Kate was a petite, blue-eyed blonde with a pretty face and a tight but shapely ass. Mari, as she was called by the family, was a brown-eyed brunette. Although not as cute as Kate, Marilyn shared the same milky white skin as both her sisters. Plus Mari had a devastatingly big, beautiful, shapely bottom. Little Marilyn’s big ass was by far the most attractive of any of the girls in the family. I wanted to fuck both of my sisters-in-law from the first moment I met them. Now that I had the magic spirit Anastasia on my side, I intended to fuck them both, one at a time. I had a plan. I took the youngest sister Marilyn first. I fucked her in every hole. I brought my wife Gloria (whom I’ve now named Big Tits) into bed with Marilyn (whom I’ve now named Buttfuck) and made the two sisters do each other. Now it’s time for me to take the final sister, Kate. I have a plan.

In my mind, I communicated telepathically with Anastasia, my magical spirit consort. ‘The next order of business is the enslavement of my last remaining sister-in-law. I plan to talk about that over breakfast with Gloria ‘Big Tits’ and Mari ‘Buttfuck’. I want you to advise me as you listen in.’

‘Yes, Master. Of course, Master’ Anastasia replied. ‘I feel you already sending the outlines of your plan directly into my mind. You are a quick learner, Master.’

I returned my attention the two sex-slaves in my bed, my wife Gloria and her 14-year-old sister Marilyn. “That was good sex, bitches” I said. “I enjoyed your bodily service to me. Your mouths, tits, asses, and cunts are delightful. You are serving your Master well. I’m glad I own you. Now let’s have some breakfast. But first we’ll take a shower. Over breakfast I want to talk to you about my plan for enslaving Kate. Once I have her, I’ll be the Owner of all three sisters.”

Gloria and Mari gratefully acknowledged my praise for their skillful sexual service to their Owner. I kissed each of them before they climbed out of bed.

Just as we had done yesterday, the two naked sisters and I walked to the bathroom. They knelt in the bathtub, put their faces cheek to cheek facing me, and opened their mouths. I began pissing into their eagerly waiting mouths. I filled one slave’s mouth before turning to the other. I allowed each one to gulp down her Master’s urine while I filled the other slave’s mouth with my golden waste water.

After the final drops of my urine had dribbled into the last lucky girl’s mouth, I said “Good bitches. Now what do you say, whores?”

“Thank you, Master” they said in perfect unison.

I reached over turned on the water control. While the water was heating up, I said “Big Tits, blow me. Buttfuck, lick my asshole.” Each sister thanked me for commanding her, and then went to work on their assigned task. Gloria sucked skillfully, soon taking my cock into her throat. Mari spread my hairy butt cheeks then began tonguing my anus. Soon enough, the tip of the teenager’s tongue was in my asshole.

When the water was warm enough, I commanded my slaves to stop their oral service to their Owner. Then I switched the water flow control to the shower. Handing each sister a wash cloth and a bar of soap, I commanded them to wash me. Again, they thanked me for commanding them, and then set swiftly to work. It seemed like no time at all before they had lathered me and washed me from head to toe. While the girls went about their work, I continually fondled their breasts, fingered their buttholes, and their cunts. I kissed them and they returned my kisses enthusiastically. After I was clean, I commanded them to clean themselves while I continued to fondle and finger them at will.

When the shower was done, we dried off. My slaves put on robes. I did the same. Then we went to the kitchen. Gloria began to prepare coffee while Mari put breakfast foods and dishes on the table.

As we sat at the table having our breakfast, I began to outline my plan for fucking and enslaving 17-year-old Kate. “First of all, bitches” I said “let’s acknowledge that Kate is a bitch in the classic sense of the word. She’s cute blonde with blue eyes and has always taken advantage of that. She’s stuck up and proud. She has a prickly personality. She can be charming when she wants to be. But most of the time, she’s just an arrogant little bitch.” I paused and smiled. “So when I take the little cunt, I aim to bring her down a peg or two ... before I debase her all the way into the basement and below. I am going to degrade and humiliate Kate until she feels lower than shit. In fact, I am going to make her understand that she is nothing but a piece of sex meat who is lower than shit in my harem. Kate is going to be my lowest slave. Lower than either of your two whores. The degradation of Kate is my project for today. And for every day after that. You two cunts will help me to achieve that. Understand me, whores?”

Gloria and Marilyn smiled and nodded their heads as they spoke over one another in their eagerness to agree with their Owner. “Yes, Master! She deserves it” Gloria said. At the same time, Marilyn said “I’ll help you treat her like shit!” The two cunts babbled on and one for nearly a minute. I nodded my head and smiled at their eagerness to exact revenge on their prettiest sister. They are happy to help me degrade and sexually abuse Kate. We were in for a happy, happy day!

Then I stopped suddenly. I said “Why am I sitting here with you two bitches having your robes closed? Open them up. I want to see your tits while I’m talking to you.”

Gloria and Mari immediately opened their robes. Gloria’s massive 42-inch E-cup tits greeted me in all their glory. Mari’s small, saucer-shaped tits with their pink, puffy-nipples seemed to wink at me. I felt better just having all of my tit property in plain sight.

“That’s better, bitches” I said. “Now Big Tits, you will be away from the apartment when Kate comes over today. I already know that she wants to come over to see what’s been going on here. She wonders why Mari spent the night.” Turning to my youngest sex slave, I said “As for you Buttfuck, you’ll also be away, but you’ll return sooner than Big Tits.”

“Master” said Mari “how do you know that Kate will be coming over?”

I smiled and reached out towards the teenager’s chest. Taking one of her puffy nipples between my fingers, I fondled and twisted it lovingly. “That’s easy, bitch” I said. “I have the power to read minds. I know that Kate has fallen in love with me, just as you did. My magical slave Anastasia has been setting Kate straight about what she should want and do. Kate doesn’t know that this is what’s going on. She simply thinks she feels what she feels on her own. It doesn’t matter. I’m going to fuck the bitch and enslave her just like I did with you and your sister.”

Mari grinned and nodded her head.

I turned to Gloria. “Isn’t that right, Big Tits?” I asked as I reached out and grabbed one of her massive tits with my open palm, then closed my fingers on the tit flesh, squeezing it.

Gloria smiled and sighed with pleasure. If I had done this even a week ago, she would have been pissed. Now she’s delighted. “Yes, Master” said my big-breasted slave.

We had finished eating out breakfast. I commanded my slaves to clear the table and wash the dishes. I went back to the bedroom to dress. When I returned to the kitchen, I saw Gloria and Marilyn putting away the last of the cleaned breakfast ware. Both of their robes were still hanging open. Their breasts and cunts were delightfully visible. I admired Gloria’s massive rack of tits and her light brown pubic hair. Although Mari’s tits were small, her puffy nipples were very cute. Her pubic hair was a shade darker brown than her older sister’s.

“Now you two whores dress and go out for a while. I’ll send you mental commands when you should come back. Mari will return first, then Gloria. You’ll find me in bed with Kate. And speaking of Kate, the bitch is taking a shower right now. She’ll be over here before too long. So you cunts had better skedaddle!”

Gloria and Mari smiled at me. “Yes, Master” they said in unison. Then they went to the bedroom and dressed.

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