Things would never be the same again with her.
That's what I thought that night sitting on our sofa, my sister next to me, exhausted, satisfied, naked.
They weren't.
A couple of days later I caught her online, in a chat client. She was at work, typing away at something, and I was at home, enjoying my free time. I asked her what she was doing, and how she felt, now that she had a day to review what had happened between us. It turned out that, like me, she did not regret one bit of what we had done. I loved her for that.
We chatted on for about two hours, speaking about this and that. Mostly we talked about that night, when she, my wife and I had made out and each cum once. We had not actually fucked. Not because we did not plan on doing that, but because we wanted something to look forward to for the future.
We exchanged fantasies then and there. She told me how she would love to be taken publicly, but in secret. I told her how I wanted to press her against a wall and firmly and quickly take her from behind. She told me she loved my body and my cock, and I told her how I had enjoyed tasting her for the first time. As you can probably imagine, we were both pretty hot after some time. She complained to me, playfully, about how she was sitting at work, and getting horny. I replied by asking her what she was wearing under her clothes. I didn't really expect her to answer me. She was a teaser, had been for some time. She always would tease you, get you all hot, and then leave you with a big hard cock and only your own fantasies.
She still manages to surprise me from time to time. Added by a smiley with a shy and innocent expression she said she was wearing a black thong and a matching bra!
Black. Her color of choice these days.
I didn't complain. I loved black underwear. Especially when it was clinging itself to a young and beautiful body like my sisters. I wanted her so much that very moment, but you probably can imagine that...
We talked some more, me telling her how I would love to be under her desk now, touching her pussy through the thin fabric of her thong. She complained, wanting my tongue to dance between her legs instead. I said I'd love to comply. We shared more fantasies, getting hotter still. After some time, she was her old self again. Having just told me how I should imagine her lying in front of me in just her panties, her hands starting to go between her legs, she finished work and was gone in less than two minutes.
My baby sister, the big tease...