You've been enduring this for a few years now, well actually the word "enduring" doesn't quite apply to you anymore, since you almost stopped feeling anything at all. It doesn't matter to you anymore, she can do anything she wants with your body, she can keep ordering you around all she wants, she can also keep pretending that she actually cares about you and you will keep pretending that you believe it. None of it matters. The only thing that does, is that your plan keeps advancing to its destination unphased.

The first time it happened you were about thirteen years old, you had already noticed that there was something different about the way she looked at you for some time. And then you finally understood what it was about. The same thing happened quite frequently with Nui as well, although she didn't seem to mind it the least bit, or rather she was enjoying the attention.
But it looked like Ragyo had some kind of particular interest in you in specific, maybe it was because she knew that deep down you didn't approve of it or maybe it's because, and as much as you hate to admit it, you're the one that resembles her the most, physically speaking. It shows from the first glimpse that you're her blood and flesh, her daughter, hers. And she had always been more than narcissic. Maybe it offered her some kind of lewd satisfaction: Making love to herself.

For the longest time though she had never approached your little sister. Ryuko had always been the rebel one, way too wild for anyone to control, even for Ragyo Kiryuin especially knowing that she was the special one, the one that managed to fuse with life fibers with success. Ragyo wouldn't want to lose her trust and would always try to keep her satisfied.

And then, one day it did happen, you don't know why or how but she did get to Ryuko as well eventually. You weren't there when it happened, too busy with the inauguration of your academy, Honnouji academy. But when you came back to visit you had learned that Ryuko had left home, and Ragyo knowing how important the two of you were to each other asked you to go and bring her back. You had asked for the reasons as to why Ryuko had left and your mother had simply dismissed it as her overreacting and:
"Being ungrateful towards me trying to show her my affection."
She didn't have to say anything else, you knew exactly what Ragyo showing her affection meant. And for the first time in your life you couldn't contain it. All of your anger and disgust with your mother were plain as day on your face.

Ryuko had meant the world to you. Despite the difference of your personalities the two of you had forged a special bond ever since you were young. Behind all your stoic demeanor and perfectly obedient daughter attitude she knew who you truly were and you knew who she was.
And more importantly the two of you were always there for each other.
You would always protect her.
You would let anything happen to you as long as it meant she was safe.

You would never allow anyone trying to hurt her...

And yet here she was, standing in front of you, doing it and asking you to repair her mistake for you. This is not the first time she's done it, hurting a person that meant the world to you. She's the one behind your father's murder and you know it.
Suddenly you're being brought back to reality as you start noticing a small reaction of shock on her face, a very rare sight on Kiryuin Ragyo's face. But that's when you realize that you've given yourself away for the first time in so many years, that your emotions must be too plain. You try to make an attempt to take back control of the situation, or rather of your face, but it's too late...Ragyo's lips start curling into a smile, but her eyes are hateful.What a curious and frightening expression. You think to yourself, but no longer showing any sign of emotion this time.
"What's with the look full of disgust Satsuki? You think you're better than me don't you?" She spits still smiling, but her eyes still hating.
"Of course no..." You try to respond but you're being interrupted by a more authoritarian tone of Ragyo's voice "Go get your little sister back Satsuki."
"Yes mother."