Her Sister's Keeper update (Patreon)

“I’m not sitting on your bed with you while you’re dressed like a porn star and wearing a buttplug.”

“You mean I can’t even wear a few old rags to bed without being sexualized?”

Natasha stood again. It sent a pulse through her milk-white curves and that pulse reached me, reminding me of how wet my pussy was. Dredging up memories of sodomizing Yelena while Natasha flounced around like she was shooting a Playboy pictorial didn’t help me think clean thoughts.

“Fine. I’ll get dressed. But please think about fucking Yelena. Have you been even close to Nirvana?”

“I don’t know what you’re talking about,” I reiterated as she went into the walk-in closet. I heard clothes slapping the floor. Naked Natasha. I half-expected her to walk back in on me, all NC-17, but then I heard cloth rustling and zippers going…

“I mean that you gain experience with fucking Yelena and you start lasting longer and longer, you’ll reach a state of being… separate from the act of coitus, yet feeling it integrally. A kind of never-never land where you’re there and not there, aware of yourself having sex but also lost in it. The pleasure becomes not just intense, but constant. No peaks. One continuous orgasm, blocking out reality in favor of pure sensation.”

That sounded… not bad. “I, uh—it’s been pretty nice.”

Natasha poked her head back into the room. She examined me like a product she was considering buying. “I think you could get there. Yelena wouldn’t let you touch her if you didn’t have the capability. Or maybe she would. She’s always liked brunettes with really pale skin. If you went a little goth, she’d probably jizz in her pants.”

“Okay, note to self for next Halloween, but what’s so great about Nirvana? I mean, I… I have a normal amount of enthusiasm for what your, ah, sister and I do together…”

She disappeared back into the closet, her voice echoing back to me. “It’s pleasure above pleasure. Deeper, more intimate, giving and receiving all at once. It will be like you’re sharing all the orgasms Yelena is having, and more… a backbeat to all the notes she’s playing.”

That sounded hot. Anything Natasha said would sound hot. “And is this something you’ve done…?”

“No. Only a top can experience this. I bottom, so all I do is take. But when a top forces me to orgasm, there’s no way I can withdraw from it and still feel pleasure. I just have to have a climax.”

“How awful,” I muttered laconically.

Natasha walked out of the closet. She was in her Black Widow costume now. As if all that black leather didn’t still make her totally, mouth-wateringly gorgeous. She preened a little. I felt like how a dog must feel before it humps someone’s leg.

“Speaking of things I have to do…” Natasha picked her phone up off the dresser. “Eleven texts from your girl. For a bottom, she can’t take no for an answer, can she? Let me just send a few things, now that I’m awake enough to reply to the replies I get.”

My phone beeped. I answered it. And immediately saw a picture of Natasha Romanoff, hands on her hips, wearing white cotton panties and bra. I’d seen her half-naked already, but witnessing her on display like that seemed more, somehow.

I quickly closed out the picture, only to see another of Natasha on her hands and knees. Behind her was one of Tony’s old robots, the Iron Legionnaire, only this one seemed way more anatomically correct than the norm, judging from the look on Natasha’s face.

I closed that picture out, but had already gotten another one—this time of the Legionnaire above Natasha in the missionary position. And another of her sucking avidly on its cock… it definitely had one… lube dribbling down the shaft with her lips pursing hungrily around the tip.

Another picture showed Natasha getting her asshole reamed by the Legionnaire as she knelt before it, her mouth caught in a scream and smoke hissing from the Legionnaire’s exposed workings.

The next picture showed it titfucking her. She was on her back, both hands down at her cunt. The Legionnaire sat on her stomach, hands pushing together Natasha’s full breasts as its built-in dildo bounced against her chin. Natasha’s face was covered with the lube stuff that seemed to come out of the sex toy, red tongue snaking out to lick away drops of it from her lips.

“Hard to find time to date in this business. For me and Yelena,” Natasha said, sidling up to me. She set her phone aside. It took me a moment to fully process that she’d just sent me all those pictures. “You’d think one of Tony’s bots would be enough to take care of my urges, but it just left me feeling unappreciated. It’s just programming, after all. It can’t really have a taste for fucking my ass the way you can. So I think I’m going to borrow Yelena’s girlfriend for a little bit. She’s swiped enough of my jewelry over the years that it’s only fair.”

“You can’t… you can’t borrow me.”

“Sure I can. Why wouldn’t I? I’ll get a good fuck out of it, Yelena will get a girlfriend who knows how to really own her ass, and you’ll get to be in my ass.” She suddenly rushed forward, wrapping her arms around me, putting her lips at my ear—and when I looked down, I saw that a zipper was undone, opening her catsuit from the small of her back to her taint, letting her voluptuous ass burst out of its leather confinement. “I want you in my ass,” she whispered to me, and I could only moan.

Then she was down at my crotch, her small hands working my fly open, getting out my strap-on. It suddenly felt like a plug on a volcano, the only thing keeping in all the throbbing I felt in my pussy…

“I want this in my ass,” she continued. Then she spat in her palm. Her wet hand massaged the dildo. I felt delirious with passion, just having Natasha do that with all it implied… My cunt hammered so hard that I felt it shake the dildo, vibrate Natasha’s hand on it. Her proud breasts stared out at me through her zipper, undone down to her waist, showing a few scarlet curls at her pubis. They grew along the open teeth of her zipper like ivy intermingling with a trellis.

I remembered stripping Yelena’s covers down to her waist, her pert breasts heaving for all they were worth, as if they were being pulled upward by how hard her nipples were. I remembered my finger delving into her sex, tumbling through her, seeking out her clit. My own was rock-hard, sparking against the base of the dildo I wore like an electrical circuit completed.

In a kind of trance, I toed off my shoes and then lowered my pants, so my strap-on stuck out unhindered. I remembered taking the cock out of Yelena’s sweetly flowing pussy, how she’d moaned a little as she lost the pain of being stretched so far… then turned over, offering her ass. ‘I’ve come too much in my pussy; now I need it in my ass. Give my ass how much you want it. Show me how you hate seeing my tight butt walk around without you having cocked it for days and days…’

Natasha wasn’t as vocal. She didn’t say any of that, but her body screamed it. A set to her perfect figure that hit something primordial inside my skull and bounced around, becoming almost like a headache. Something I needed to alleviate.

She stood next to the bed… I knew it was where I’d have her… and she turned off the lamp. The darkness wasn’t enough to hide her from me. What little light there was in the room rebounded off her shiny leather, outlining her curves. Gleaming on her jeweled buttplug. Then it was coming out… out, out, out… and finally nothing… her ass was empty… mine to impale, mine to fuck just like I had Yelena’s.

I heard the bed rustle. I knew she was on it, could picture her like she’d lain there when I came in. Only all different now. I reached out and found her ass. It felt even more round, even more soft, than any of the peeks I’d gotten. I remembered her walking around in that skintight outfit, her ass weaving and bobbing until it was impossible to look anywhere else.

I felt for, found her leg. The knee embedded in the bed. The leather cool to the touch, but I could feel her heat underneath, like an aftertaste. I knew there’d be more at her ass, her breasts, her lips… all that wondrously bared flesh, mine somewhere in the dark.

I got my knees between her legs. I remembered telling Yelena I loved her. Of course, that was usually when she replied something about how I should love her ass or prove it with my tongue. Did it make any sense to prove my love for Yelena by playing by her twisted rules? She’d sent me here, after all, and Natasha was a hero—she wouldn’t seduce her sister’s girlfriend, not unless it was okay in Spyworld. But maybe she was trying to judge by Bishopworld, and they wanted to see if I could be faithful because that was my love language… only could I change my love language? Because learning to ass-fuck better from Natasha Romanoff seemed like a better love language…

“Put it in my ass,” Natasha said. “C’mon, at least try and dom me…”

I reached out to her, like I couldn’t believe she was still there. Once again I confirmed that she wore her catsuit, only all sexy, letting out her curvaceous ass. I ran my hand down the swerve of her ass and found the bottom of the opening where the leather resumed. It felt as hot as her flesh did and I imagined the warmth pouring off Natasha, constrained by her leathers, only able to penetrate where her suit was open. Or something like that.

Or maybe her pussy was just burning so hot that it warmed up the suit.

“Beg,” I said, and heard Natasha growl and I knew that—though I might be about to die—I had succeeded in getting under the Black Widow’s skin.

Not bad, considering she still had her catsuit on for the most part.

I ran my hand inside her suit, feeling for her sex. “Maybe I want your pussy,” I said. “Maybe after you come for me a few times, then we can revisit whether I want your fat ass.”

Her hand came down and grabbed my wrist. “Maybe stop pretending you haven’t been dreaming of this ‘fat ass’ since the Battle of New York, fangirl. You’re not going to make a sub out of me by calling me a cunt and spanking me a few times. You’re going to have to ruin my ass. And you’re going to have to do it before I get bored and check my phone, because if you can’t handle my hole better than an AI, I’ll just tell Yelena to see if she can find a black guy to date. And I have a visa to Wakanda. I can find black guys.”