Monopolizing Mary

I waited a tick, to see if anything would change. Would the world collapse from my universe bending request? Apparently not, since Sadie’s only response to my statement had been to huff in annoyance and walk off.

Well that was anticlimactic. Did that mean it didn’t work? That was kind of a bummer. Should I try again and ask for something else, or did I waste that particular-

“Hey bro-bro. Da fuck are you doin’?” A completely unfamiliar voice said from behind me. I turned around, and my jaw dropped. It was Mary. But it was Mary in a way I’d never seen her before.

Her hair was still blonde, and in pigtails, but everything else was completely different. Her crop-top had transformed into a cut-off hoodie (still with copious amounts of underboob, just for the record), her jean shorts had become basketball shorts, and her heels had become worn out sneakers.

She looked like I had been changed into a girl!

…

Well, no. I wouldn’t have dressed like a massive slut. I mean, come on, even for lazy clothing it was still super revealing. But the theme was there! In fact…

I quickly looked down at myself, and realized exactly why she was wearing that. It was the outfit I was wearing! The same brand of hoodie, even the same color basketball shorts!

“What the hell? Where did you get those clothes?” I said, slightly freaked out. This had big implications. Could my powers create matter? That would be completely broken!

“I stole them from your room. Well, mostly. You didn’t have an extra pair of shoes so I used an old pair of mine from a few years ago, and I had to cut your hoodie in half to make it work properly. But I made due.” She said, nonchalantly.

Oh thank god. See, as cool as creating clothes out of thin air would be, I wouldn’t want to– wait.

“You did WHAT to my hoodie?”

I looked at her hoodie. It was my second favorite. It even had my cum spot on it from yesterday that I didn’t clean off.

It was now cut clean through the middle.

Even when she was on my side she was a menace… god damn it Mary.

It turned out, my wish worked as intended. Mostly. What I had been originally going for, was a connection with both of them. I wanted them to see me as closely as they saw each other. I could then use the trust they had in me to corrupt them into being whatever I wanted

The issue with that, is that I guess I didn’t phrase it correctly enough for it to work on Sadie. I didn’t just get her connection with Mary, I STOLE it.

Funnily enough though, despite Sadie being the one who ‘lost’ something, Mary was the one who really changed. Not only the clothes, but the mannerisms as well.

Case in point:

*THWACK*

“Whatcha doin’ Jackson?” Mary said, smirking as she sat down on the couch.

Yes that’s right, my sister had just smacked my ass. Not only was she talking and dressing different, she was now also a pervert.

“What have I told you about touching me like that?” I said, trying to instill some heat into my voice, and clearly failing judging by the smirk still on her face.

“Come on, bro-bro. You’re just as much of a pervert as I am.” She responded.

That was true, I certainly was a pervert, however there was a big difference in how we acted.

See, despite the change in Mary, she had still kept her personality. She was still condescending, and outgoing, and laughed at people she thought were beneath her. The difference now was that she was laughing with me instead of at me.

In her eyes, I was in on the joke. She was still a bully, but she viewed me as her partner in crime. This put me in a difficult spot. I certainly didn’t want to put down people like she did, but I also didn’t want to disrupt the relationship that I had put so much work in to steal. You get what I mean?

In any case, despite her now being on my side, she was becoming annoying.

“Come on, have you given any thought to my idea earlier?” A few hours ago, she pestered me about joining a new gym with her. Looks like she hadn’t given up on it yet. “What reason would you have to say no? Unless you’re scared of getting hot and sticky with me.” Mary jeered, with a lecherous smile on her face.

That was another thing she apparently inherited from me. My lack of care about blood-relation. She hadn’t stopped teasing me and eye-fucking me since she transformed.

Now I know what you’re thinking: ‘What’s wrong with you? Just bang this chick already!’ And see that’s where this situation gets tricky.

I don’t WANT a partner in crime. I don’t want a friendly twin who goes to the gym with me and plays video games with me. Even if that friendly twin enjoys having copious amounts of sex.

I want a fuck-puppet. I want to take her mind and twist it into a pretzel until her only thought is how she can better serve me. I want her entire body to be a temple dedicated to my worship, and have the only reason she cares about her looks be because she knows I won’t fuck her if shes ugly. That’s what I want.

This whole buddy-buddy thing? It’s cute and all, but if I give in and let her have that modicum of control in our relationship, it will make it that much harder to take it away later. I don’t want to go to her, I want her to come to me.

So I had to wait.

“Hey, dude. What the fuck is your problem?” Mary said, first thing to me as I walked out of my room. I checked my watch. 7:00 am. She must have been waiting for me. “I don’t think I could be any more obvious. Are you seriously this dense?” Mary said.

I looked at her face. It was scrunched into a beautiful myriad of emotions. Confusion, anger, determination, shame, and lust. She was so deep in heat it was ridiculous. I looked down, and saw she wasn’t wearing any panties, and her pussy was soaking wet.

Honestly, I wasn’t surprised. I had been avoiding her affection for a whole week, and for the past few days it had clearly been getting to her. Just like me, she now had a massive libido. The issue was that, since she still shared a room with her twin, she couldn't masturbate anymore. Since she was no longer comfortable around Sadie like that, she wasn't able to relieve herself.

Her new personality also meant she wasn't popular at school anymore, meaning that she couldn't go and pick up a random guy to fuck. Pair that with constantly being around someone she clearly had the hots for, and it wasn't a massive shock that she would get this ****.

I looked up into her eyes and prepared to say the words I knew would piss her off the most.

“What do you want?” I said, as obliviously as I could.

“I want to fuck you asshole!” Mary practically yelled at me. Her bosom was heaving with heavy breaths, and her face showed the triumphant look of someone who thought they’d laid down some massive revelation. She obviously thought that now that I knew that, I would be just as on board with it as she was. Unfortunately for her...

“So?” I asked, dismissing her easily. “I don’t want to fuck you, so tough luck. Go hump your ex or something.” And then, with all my strength I **** myself to start walking away.

“Wh-what? You don’t- but- hey come on!” Mary said, sounding confused and hurt. “I know you’re a pervert just like me! What kind of pervert wouldn’t be into ****! I’m-I’m tight, I swear! I’ve only had sex once, and he was small!” She continued, desperately pleading her case.

“I only want to have sex with someone if I think it’s going to be exclusive. Why would I have sex with someone if they just turn around and do it with someone else.” I said, still walking down the hall.

“But I won’t have sex with anyone else, I swear! I just want you. I-um, let me prove it! I’ll do whatever you want. You want a blowjob? I’m good at blowjobs!” The desperation in her voice had turned into panic.

I stopped at the stairs at the end of the hallway.

“Beg.” I stated, emotion completely abandoning my voice. “Beg for me to let you suck my dick. Maybe if you’re good enough, I’ll fuck you afterwards.”

“Wa-wait. Are you serious? You’re really gonna make me suck your dick for the right to fuck you?” Now that Mary had calmed down a bit, she seemed to realize just far this had tipped in my favor. Anger had begun to creep into her voice at the implication I had given her.

“Then let me be clear.” I said, unearned authority coating my voice. “If you want to fuck me,” at this point I grabbed her by the ass, and pulled her body against mine. “Then you need to drop to your knees, and suck my cock. Am I understood?” I glared down at her, daring the poor girl to talk back.

At this point, she was shaking like a leaf. The desperation of her dry spell and her attraction to me was warring against her dignity and common sense. In the end though.

“I’ll do it.”

And that was that.

Mary looked up at me nervously. She was currently nestled between my legs, kneeling in front of me while I sat on the edge of my bed. I had debated laying down and letting her service me that way, but something about the idea of her kneeling for me was so much more appetizing.

“Pull it out.” I commanded. At this point I had to actively work to keep the giddiness out of my voice. I felt drunk on power.

Slowly, and with great deliberation, Mary pulled down my basketball shorts, and pulled my boxers out of the way.

With a meaty *thwack* my cock slapped down onto her pale face. “Now lick it.” I said, no longer able to hold in the smile on my face.

My plan wouldn’t have worked with the old Mary. The old Mary recognized that she could pick up any guy she wanted. The new Mary, unfortunately for her, picked up my self-esteem issues when my wish reprogrammed her brain.

The ego boasting that years of being the popular girl had given her, were wiped away in an instant. They were replaced by memories of girls shaming her and boys rejecting her. I found out later, that despite being a massive slut, Mary’s new memories only recall losing her virginity, and no other sex encounters.

Whether my wish rewrote history, or just Mary’s herself, I don’t know. I doubt it matters too much right now though. After all…

*SHLURP*

I looked down at Mary, dutifully worshiping my cock. Her tiny pink tongue lapped up and down the shaft, before she placed the head into her mouth and took it into her throat. I groaned loudly in appreciation.

This was her fifth blowjob this week, and her second today. After the first one, she had quickly offered to give me more. After I refused to fuck her after I came the first time, she came to the conclusion that she needed to be better, and just wasn't good enough at giving head. This was ridiculous of course, she was a natural, and I was a virgin. She could have ACTUALLY been terrible at giving head and I still would have loved it just off of principle. However, I digress.

She was currently tucked underneath my desk while I worked on something on my computer, and at this point her face was completely coated in cum. I still hadn’t fucked her up until now, but she was doing her best to change my mind.

I didn’t want to give in and give her what she wanted quite yet, but it was becoming hard to hold myself back. I needed a suitably embarrassing way to prove that I was the one in charge before I fucked her.

But what to do…

At this point, the vacuum that was Mary’s throat kicked up to eleven, and I lost control, spraying my third load of the day down her throat. Previously I had been coming on her face, and she clearly wasn’t prepared for the cum to be in her mouth.

She stood up shakily, clearly about to go spit it out in the sink. We couldn’t have that, now could we?

“Swallow it.”

Two words was all it took to freeze her in place. She turned around, glaring at me incredulously.

“Swallow it you dumb slut.”

Her face turned green, looking at me in desperation. Her eyes were begging me to change my mind.

“Swallow my cum, or I’ll never fuck you.”

She looked at me for a few more seconds. Then slowly swallowed down the load that I had given her. Excellent. Nothing quite like blackmailing your sister into swallowing your cum, eh?

Cum to think of it (heh, get it?) that post-nut clarity had given me an idea. I looked over to my bathroom, where Mary was desperately cleaning her mouth out with the tap water.

“Hey Mary, I’ve decided we’re gonna to do what you want after all.”

Her head shot up and looked at me, her eyes wide with anticipation. Her face fell instantly with my next words however.

“That’s right… we’re going to go work out! Where’s that gym you had in mind?”

This was going to be _fun.- - - - - -

_

A/N: Hope you guys like this one. I feel like the ending isn't super well written, but hopefully the fact this chapter is 2.2k words long makes up for it being kinda shitty. **** this chapter, but next chapter we'll be heading to the gym and Mary will finally get what she's been begging for ;)__