Disclaimer: I do not own Thor, The Avengers, Avengers: Age of Ultron or anything to do with Marvel. I do not make any money from the writing of this story.
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Natasha Romanoff had survived all kinds of torture before, but nothing like this. Night after night, hour after hour of orgasms, mostly achieved through anal sex, with her only breaks coming in the form of Sif sitting on her face enforcing Natasha to eat her pussy or ass. Or being forced to watch her precious Maria Hill being butt fucked. So far today she had only passed out twice, and both times when she woke up Natasha found herself in a different position.
The first was the most uncomfortable, on her back in the centre of the bed with her hands and feet practically tied together next to her head, bending her in half which put incredible strain on even her incredibly flexible body. The second time she awoke her legs and back were at least shown some mercy as she was now spread-eagled, although that was little comfort because who knows what Sif had planned now.
Of course it became very clear what Sif had in mind when Natasha groaned and slowly allowed her eyes to open. Things had been unnaturally quiet so she was unable to sense anything before opening her eyes, but then things became very clear as she found herself surrounded by beautiful women, most of them completely naked while some wore menacing looking strap-on dildos.
Sif was unsurprisingly one of the latter ones, her cock longer and thicker than all the others to show her superiority, but it wasn't by much, and despite herself Natasha felt a wave of excitement upon seeing particularly Sif's strap-on, which she had got to know very well over the past week or so.
Stepping out of the little circle around the bed Sif smiled wickedly and said, "Ah, finally awake I see."
Choosing not to justify that with a response Natasha just stared blankly at her captor, daring her to do her worst. Instead of punishing her for her insolence with a slap across the face or something like that Sif simply gave the spy another wicked smile, slowly crawled onto the bed and up Natasha's body before lingering with their faces inches apart.
The entire time she did that she kept that stupid smile on her face, only stopping when she leaned down to gently kiss Natasha right on the lips. Natasha hesitated for a moment, then decided she might as well play along and wait for an opening, so she started kissing back, but just as she was really getting into it Sif broke away and started kissing her neck.
After a few long seconds of that Sif whispered in Natasha's ear, "I'm very impressed with you little spider. Far more powerful beings then you haven't lasted nearly as long against me. However for all your stubborn determination, you will suffer the same fate as anyone else on this planet who defies me. Mmmmm yes, you will fall to me and my army. Now... Pepper, you know what to do."
The last part was directed at the woman in question, Natasha just about able to crane her neck upward to see the approaching CEO. Pepper was as naked as she was, and despite the ominous words Natasha guest that what would happen next would be mutually pleasurable.
Sure enough Pepper got onto the bed, turned around and crouched over to Natasha's face before starting to lower herself downwards, Natasha's mouth literally watering as she eyed the tasty treat coming her way. Then she was punished for completely ignoring Sif as the tallest woman in the room, who had been slowly making her way to her boobs, suddenly latched onto a nipple and bit hard down upon it.
Sif smiled again as this forced a surprised cry out of the stubborn redhead, although the brunette didn't bite down that long, and not with all her strength. Not even close, or else the results would have been very unpleasant for them both, and unpleasant was the last thing she wanted.
No, the plan was to bombard Natasha with pleasure, so much so that she would finally break, which was why Sif quickly gave that nipple several eager licks before gently beginning to suck on it. That was also the reason she began moving back and forth, reviewing the process except without the bite as she revelled in Natasha's big boobs.
Being a butt girl Sif had pretty much gone straight for Natasha Romanoff's amazing ass, spending days spanking it and especially fucking it. She wanted to spend longer concentrating, maybe her whole life, but Sif had an entire world filled with sexy women to conquer. Hell, she had a whole galaxy of them. So she decided to swallow her pride and get her other slaves to help her with the stubborn conquest.
On the bright side it forced her to tear herself away from Natasha's bubble butt long enough to savour the curvaceous woman's second best feature, her big beautiful tits, Sif allowing herself to become completely lost in them for several long minutes.
She was so lost she almost didn't register the sharp cry of pleasure which let her know that Pepper was now sitting on Natasha's face, the deadly spy unsurprisingly not hesitating in beginning to lick her soon to be fellow slave's pussy.
It was a reminder that Sif should move on at some stage, and she didn't need Wanda to tell her that's exactly what Natasha wanted her to do, but she wasn't done with The Black Widow's boobs yet, so Natasha would just have to wait. Which clearly annoyed Natasha, although she got the message that if she wanted pleasure she needed to give it to Pepper first, her experience making the CEO constantly crying out in pleasure in no time.
Because she knew her bitches wouldn't dare say anything, and Natasha couldn't with her mouth currently full of pussy, Sif pressed her face in between those big tits and literally smothered herself with them for a few glorious seconds. Then she began motor-boating them, mostly for her own enjoyment but also to show Natasha she could do what she liked.
Sif did that a few times in between increasingly harder licks and sucks, but eventually her hunger for pussy took over and she slowly began kissing her way down Natasha's body. Then once she was in position Sif just admired her prize for a few long seconds before leaning forward and slowly sliding her tongue over Natasha's pussy.