Disclaimer: I do not own Thor, The Avengers, Avengers: Age of Ultron, Agents of SHIELD or anything to do with Marvel. I do not make any money from the writing of this story.
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Bobbi Morse was pushing herself like never before when it came to her training lately. She had always trained hard, but now she wasn't just preparing to protect the world, or even save her own life. No, Bobbi was training to save her dignity. Her self-respect. Hell, Bobbi was literally trying to save her own ass.
Because she didn't want to suffer the same fate as Natasha Romanoff and Maria Hill when, and probably if, the alien known as Sif attacked SHIELD again. Of course the entire time she was training there was a voice in the back of her head asking, if The Black Widow couldn't resist Sif, what chance did she have? What chance did any of them have? And, was Sif right, had she already won?
Speaking of the devil what Bobbi had feared suddenly happened, and a portal opened up with Sif strolling through it. As usual she wasn't alone, her trusty little side-kick Wanda Maximoff, there to teleport her in and out at will and make sure that everyone at SHIELD witnessed this, video cameras and screens filling the room from out of nowhere.
But that wasn't the most disturbing part, as Sif was also accompanied by Agent Romanoff and Director Hill, both naked except for the collars around their necks, complete with leads that Sif was holding so she could pull them along like the pets they had become. They even walked on all fours and panted, the incredibly strong women shameless in their submission to their Mistress.
"Rejoice Lady Warriors of SHIELD, for I have come to make you mine." Sif announced proudly, "Soon you will be nothing but mindless sex slaves, with the honour of devoting your lives to pleasing me. Some of you shall even know the joys of eating my pussy and ass today, and by the end your butt holes will look like this."
With just a snap of Sif's fingers Agent Romanoff and Director Hill scrambled to their feet. For a second Bobbi thought they would attack Sif to try and get some of their dignity back, but no, instead these two proud and strong women walked slightly forward, turned around and bent over while reaching back to spread their cheeks wide open, exposing their gaped butt holes.
Which unfortunately Bobbi had seen before, both on a TV screen and in her own shameful fantasies afterwards, although while those gapes had been wide before each of those poor ass holes now looked like the Grand Canyon. Like the initial sight it was one which disgusted Bobbi, and yet to her shame turned her on.
"Yes, your ass holes will be gaped as a sign if your new places as nothing but slaves of Sif." Sif continued with glee, "Isn't that right my pets?"
There was a chorus of yes Mistress Sif, and eager to prove herself Natasha then piped up, "Mmmmm, your butts will all be used for the pleasure of Mistress Sif, just like my fat ass was. Oh yes, you'll all be ass fucked by Mistress Sif, and you will never be the same again."
Also eager to prove herself Maria interrupted her girlfriend, "Oh how I envy you all, because there is truly nothing like your first time with Mistress Sif. You're pathetic attempts to resist her. Feeling the ecstasy she can give you for the first time. That moment where she takes your anal cherry. Mmmmmm, and the moment you break completely. Oh if only I could feel that way again. But once you do, you'll never want to be anything except the personal fuck hole of our Mistress Sif."
Sif chuckled with delight at her slaves words, and then before Wanda could join in asked, "So, who's first?"
There was a deafening silence, and then Melinda May spoke up, "Me."
"Excellent." Sif grinned.
"But only if you can defeat me in combat." May challenged.
Sif laughed loudly, and then after a few long seconds of that questioned, "Are you serious? Please tell me you are serious."
"As a heart attack." May said dryly.
For a moment Sif looked thoughtful, and then arrogantly said, "That's not nearly enough of a challenge."
"Then fight me too." Bobbi piped up, trying to hide her nervousness.
"Oh, this should be good." Natasha grinned, still spreading her cheeks.
"They're the best SHIELD has to offer Mistress Sif." Maria quickly added, "Second to me and Natasha, of course."
"I suppose that makes you third and fourth best." Sif grinned, "I suppose that will do. Yes, I shall enjoy humiliating you in front of your comrades, and making you mine."
"Don't count on it." Bobbi bravely called out, before charging her opponent.
It wasn't her smartest strategy by far, but it wasn't like Bobbi really had any good options. She didn't trust Sif not to call upon her slave Wanda for an unfair advantage even if she got the upper hand, and there was no guarantee Bobbi could have done that even if she was at 100%.
Ironically preparing for this fight was her downfall, as when it came she was too tired to put up much of a fight. She tried, but embarrassingly quickly the Mockingbird was pinned to the ground, completely unable to move, Sif grinning down at her as she stood on her neck while Wanda gave her a nice slow three count, just to rub in the fact that she had just been beaten with ease.