[M4F] I didn't realize the girl I dominated online was my sister!

I'd been talking with her, and playing with her, for a year. But, we had a strict rule for both of us, no sharing face pictures. It was one I was fine with, and it didn't really matter to me as she was more than happy to share pictures of the tasks, of the things I made her do. We'd met online on a kinky forum, and just clicked right away. There was this sexual energy that we both had that made us so compatible. The way I was as a dom and she was as a sub was just right for one another. We made sure that everything was safe. And we became good friends and a little bit more than that. Right now, we're at the point where we have both agreed that we're exclusive to one another. That we aren't looking for anything else. And she brought up meeting. That made me super excited. In the latest set of tasks she'd written on her belly, just above her neatly shaved slit, that she loved her sir. The message she had sent was shy. Asking if this was okay. And I'd told her that the feeling was mutual

As for my sister? Well, she was a brat. Always winding me up. Just in my hair. Honestly, we wound one another up. We couldn't be more different. I was a nerd, wearing glasses and I just looked... well, kind of normal. She was pretty, I couldn't deny that. But she was into so much stuff that I just didn't get. We had been close a while ago. But now we had just... I dunno, drifted apart a little bit. I couldn't exactly put my finger on why. But there it was.

Today, though, we'd agreed to meet up. I had told her the colour of my jacket, and she had told me the colour of the skirt. We were going for coffee. It was wild when we figured out we lived in the same city. I was super excited. The bell of the coffee shop jingled as I stepped in... And there she was, my sister. Wearing that skirt she said... I looked around, and no one else was. And the other thing we'd agreed on, we had written each other's usernames on the back of our hands. I could see Lingonberry on hers... And I had... well, hers...

I sat down in front of her, a stunned expression on my face. And all she could say was "You?" But... well, we'd come this far. We'd already crossed the sibling boundary, right?

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ooc> I left things vague, is she older or younger? What is she into? I'm looking for a literate partner who will come with ideas to fill in this vagueness. I'm happy to talk! I have ideas, but I am looking for a partner who will be inspired by the idea, and want to help me tell a fun, kinky but wholesome story between siblings who love