>>2112
You guys totally left that request open because someone else posted a new one without filling the one before (which is very much poor etiquette), so here it is.

***

“Big brother? Who were you talking to just now?” I flinch and look up to see the face of one of my sisters peeking behind the shower curtain. “That sounded like something forbidden, are you in trouble?” How the fuck did I miss her – and the other one too, probably – being in here? I was talking with the Boss, and this was a secure line, so I didn't bother using code or whatever, I didn't think the girls would even be here. Now I am in trouble.

“...I'll explain in just a moment, stay right here.”

I leave the bathroom and dial another number. “There's a problem. I was careless and there's two witnesses. ...Both are twelve, I doubt they understand what it's really about. ...I don't know. ...Okay, if I have to. ...No, it's no problem. Just make sure I have an alibi right now, and send a cleanup crew to my location, I won't take long.”

Well, that's a bit of a shame. Melissa and Amy aren't my sisters by blood, but after dad remarried, my new mom brought them along with her. And while it's not like I dislike them, they're still at an age where they can be way bratty and annoying. But they're also past the age of the Westermarck effect, so in a few years' time, I might have gotten both of them in bed, possibly at the same time, a twin step-sisters threesome would have been quite the feat. But as it stands, I only know them for like a year, and at this point the job still comes first, so they both have to die.

I return to the bathroom, to find both of them still in tub, completely naked. “Alright, I'll tell you about that phone call you just overheard.” They at least have the decency to look guilty for eavesdropping, not that it will save them. “Actually... Melly, can you come out and stand in front of me?”

She complies with a slightly confused expression, the water running down her perfectly smooth skin, her body not quite a woman's, but not entirely a girl's anymore either, with the undeniable hint of a curve to her hips, and small, petite breasts glistening under the small droplets of water. Too bad really.

I take Melissa's shoulders to gently turn her around so she's facing the bathtub again – and away from me, as I reach around her head with both hands, one holding her chin and the other the top of her head, then twist and pull just like I was taught.

Crack. Just a moment later, the girl's neck audibly breaks and she instantly goes limp as I drop her body to the floor, twitching a few seconds longer before dying down, a yellow puddle forming between her legs.

As soon as she realizes what just happened, Amy shrieks and backs against the wall, trying to get away from me, but there's nowhere to run. “P-please, don't kill me! I won't tell anyone, I swear!”

“Sorry, but I have no choice. And if I don't obey, I'll probably be killed instead. And then they'll send someone else after you anyways.” Okay, that's overdoing it a bit, the Boss wouldn't kill anyone for something this trivial, he'd only dock my pay for a while, and maybe have me beaten up a little. He would send someone else, though. “But I can promise I'll make it quick at least. Just stand right here.”

“U-um, would you... fuck me before I die? I'm still a virgin, and I really don't want to die without knowing what sex feels like at least once.” Huh, looks like at least half of my twin threesome fantasy may come true, I really should have asked Melly if she was in too before killing her.

“And I'm not too young or whatever,” Amy continues. “I watched a bunch of porn with Melly together, so I know what to do.” To prove her point, Amy approaches me, then opens my zipper and reaches into my underpants to pull out my dick, and after stroking it a few times to get it hard, lowers her lips around it, sucking and licking the tip far more expertly than any twelve year-old would have any right to know, but I won't complain.

After a few more moments I stop her. “Come out, turn around, and get on your knees, we'll do it doggy style.”

“Okay.” Amy does as she's told, her midriff resting on the edge of the bathtub as she presents her ass and pussy to me, still dripping with water of course, but I can't shake the feeling she's the other kind of wet too. I briefly spread her labia with my fingers, then enter her, quickly encountering resistance as Amy winces. “Your first time is supposed to hurt a little, don't worry.” I keep pushing until her virginity gives way and Amy lets out a squeak as I enter her all the way.

“I-it's pretty big...”

“Thank you. A man always likes hearing that.” I start moving back and forth, and quickly Amy's whimpers turn into moans as she starts moving along with me. However I still have a job to do, so just a bit later, once I'm sure Amy has really gotten into it, I lean forward, briefly caressing her nice, firm tits, then suddenly shove her arms away, and lean on the back of her head, pressing it underwater.

Of course Amy immediately starts struggling, but there's no way she can escape as I continue fucking her even as I'm drowning her. She's thrashing and kicking, splashing water everywhere, but it doesn't take too long for her movements to first ramp up in intensity, but then quickly start to weaken as I already feel my orgasm nearing, Amy's desperate struggles are really quite hot, and her pussy is nice and tight.

Barely a minute later, Amy's movements die down for good, and just in time, as I cum moments later, slightly groaning as I fill her pussy, then after slowly winding down I pull out of her, causing a bit of cum to drip out of her pussy for the classic creampie.

Now to keep myself entertained until the cleanup gets here. ...Actually, I still have enough endurance left for another go, and I'm pretty sure Melissa is still warm, so I lift her lifeless body, then sit on the toilet lid as I lower it onto my dick, the girl's vacant eyes staring at the ceiling. This may not be quite the twin threesome I had hoped for, but suppose close still counts.

***

So that no one gets left out or whatever, instead of a new request, I'll just reiterate the previous one >>2126