Disclaimer: I do not own Game of Thrones. I do not make any money from the writing of this story.
Author's note: This story takes place after Season 7, but deviates from canon after that.
*****
Sansa Stark was barely through the door of her bedchamber when she was forcefully turned around and pulled into a rough bruising kiss. For a horrible second she had a flashback to her last husband, but it quickly went away as her head was forced lower. Much lower. And she felt boobs pressed against her own. Big ones! Which quickly reminded her who this exactly was. Which made her panic.
Not because of who it was, but because the door wasn't closed yet. Thankfully she was duly aware of it being closed before she was forced backwards towards the bed, and then push down upon it, breaking the kiss and causing her to gasp out loudly, and then again when she hit the bed.
She then looked up into the eyes of the tiny girl who had just assaulted her with betrayal, but despite herself also desire. It was of course the latter the other girl was clearly focused on, grinning wickedly as she slowly crawled onto the bed on top of Sansa, the two of them staring into each other's eyes the entire time. Sansa knew she should protest, but she couldn't. She just couldn't.
She was utterly frozen and helpless beneath this tiny girl, this trained assassin, unable to do anything except kiss her back and whimper into the mouth which assaulted her. It was only when that mouth moved to her neck that Sansa finally spoke up.
"Arya, we can't!" Sansa whimpered.
"Why not? Everyone else is." Arya grinned against her sister's neck.
"And by everyone, you mean the Lannisters and the Targaryens? That's really the company you want to keep?" Sansa huffed.
Lifting up so their faces were inches from each other Arya frowned, and then challenged, "Tell me you don't want too?"
There was a brief pause, then Sansa pointed out, "It's wrong."
Arya grinned evilly, "That's not a no."
"We just killed a man." Sansa murmured.
"It was the right thing to do." Arya shrugged, grinning wickedly, "And you enjoyed it."
"I didn't." Sansa protested weakly, although she didn't sound convincing even to her own ears.
"You did, and it scared you." Arya pointed out, "That's okay, you don't have to say it out loud. It's okay to scare yourself sometimes. We're strong, capable of anything. And it's wrong, but to take a life, it makes us feel powerful. Like Gods. And seeing you today, hold someone's life in the palm of your hand, and do the hard thing, the right thing, taking it away. Fuck, you've never been so hot. I liked it too. Being your weapon. Executing your will. Doing what needs to be done. But you were right... it bothers me that you have power over me. Which is why I want to take you and make you mine. And I think you want it too. Not from some man, but from me. From a woman. Your own fucking sister. And it's okay to be scared, but you don't have to be. I'm here now, and I'm going to take care of you."
There was another pause, longer than before, and then Sansa murmured, "It's wrong."
"I don't care." Arya said, leaning down for another kiss.
Initially Sansa started kissing back, then she broke it and whispered against her sister's lips, "Here? Really? In Mum and Dad's room?"
"Hey, you were the one who took the room." Arya grumbled, cutting off any more protests with another, this time more firm kiss.
In the process Arya pressed herself down more firmly, pinning Sansa to the bed. Sansa was a lot bigger than Arya. She always had been, but now she was fully grown Sansa towered over most women, while Arya was a tiny little thing, barely taller than Lord Tyrion. And yet Sansa had no doubts that Arya could have kept her pinned with ease no matter how hard she struggled.
Equally she was confident that if she insisted Arya would stop, and there was almost a moment where Sansa did insist that. Perhaps in another world she had, and that had been the end of it, but in this one she initially tensed up, and then relaxed, giving her body to her little sister.
Partly because their childhood home, and this room in particular, had already been so tainted by the murder of their parents and two of their brothers, amongst other things, that Sansa figured what was one more injustice? But mostly Arya was right, which was really annoying, especially as a smile against her lips told her that her baby sister knew this all too well.
Sansa found the power she finally had to be intoxicating, and she had never felt more powerful then when putting Little Finger on trial and sentencing him to death. Although while she enjoyed the fleeting moment of power it felt good to be underneath someone truly powerful, and someone she clearly loved, even if it was her sister. And Gods forgive her, it felt good. So good.
Arya wasn't actually expecting it to be this easy. She was almost disappointed. But mostly she was filled with satisfaction at having been proved right. Well, that and lust, but mostly the self-satisfied thing, which she took a few long moments to savour as she just kissed her sister through several long minutes.
Then they began the long process of taking off each other's clothes, Sansa not only helping her but even exchanging a few kisses along the way, which was a very positive sign. As was the fact that when they were finally naked it was Sansa who grabbed Arya and initiated their latest kiss, this one the most passionate yet with Sansa's tongue putting up quite the fight before Arya's tongue inevitably conquered it.