She found out and teased me the whole week

I suppose I should have double checked to cover my tracks. I don't know how but I guess Anna had found her panties in an other place that where she left them before going to sleep. Or maybe she wasn't sleeping at all ? Whatever it was, she knew, but didn't say so until a few days later. And in the meantime she had made plans to tease me and bring me to her. And always with that seductive grin on her face.

It was like a game to her. I remember on sunny afternoon she had been lying in the garden wearing the most minimalistic bikini I'd ever seen. When passing in the living room, she had a towel wrapped around her waist, but as soon as she got out of their sight - a corner of the garden I could see from my bedroom - she dropped it and revealed a g-string separating her two perfect buttcheeks. Plus, her triangle bra was squeezing her boobs nicely. She knew I would be watching. God she was beautiful.

And that was only the start. She made a few moves like that whenever she could. Like dropping things to the floor and bending at the waist to grab it. Or ostensively not wearing a bra under her clothes while sitting next to me in the living room. She also let her bedroom's door opened - while she was in underwear or butt naked - when I was going to pass by, just to tempt me even more. I had seen her from the back, naked in front of her open wardrobe. I could stop staring. Her ass was amazing. And I could see a little part of her breast. After a minute, she hadn't move but I could see a smile on her face. Then I realized she knew I was watching.

It was late in the night so I went to my room and decided to masturbate to forget it. Looking at filthy porn would help me forget and release the tension. My sister was making me feel desirable, so I needed someone to tell me how slutty and worthless I was. I ran my webcam stream and started watching at pictures of trans while waiting for a bit a audience. I heard someone at the entrance door. I thought maybe Anna's boyfriend Mike was coming around. How could she tease me like that just before seeing him ? I tried getting back at my spectators asking me to strip down my skirt and finger myself for them. I was starting to enjoy the moment until I heard a recurring noise in the next room. I hoped it was not what I was thinking about. But strangely, I realized the way it made me feel.

Like I didn't want anyone else having her. I turned off the camshow and got out of my room silently, still in my slut's outfit. I didn't expect to find Anna's door open. A ray of dim light was coming out, and still that cycling noise. I walked to the door as quietly as possible, starting to hear my sister's breathing in rythm with the noise. I dared taking a peek and I saw her, alone, no boyfriend, totally naked on her bed, her legs widely spread towards me, sticking one of my dildos in and out of her juicy pink pussy. Her lips looked soft and, and her pubic hairs were trimmed in a little triangle pointing right to the spot. I stood there just watching her fucking herself, whitout even noticing her eyes staring at me.

She wasn't smiling at that point. Her face was full of lust and I could tell it was both the pleasure of my dildo and knowing I was watching that was turning her on. I couldn't think. I just went inside and closed the door to lean against it. I let one hand rub my tits through the fabric of my silky top, while I jerked off with the other.

We were breathing in sync, the dildo penetrating her each time my hand went down along my shaft. Almost feeling like I was actually fucking her. The forbidden act we were fantasizing about. Did she want me to take her eventually ? Or even right then, that one night ?

I was going crazy. When she stopped the dildo just on the outside of her pussy, rubbing her lips with it, I couldn't help but wait until she would stick it in again. I wanted to cum and she was stopping me. My cock was shaking. She could tell I was on the edge. And she wanted me to know that she owned me. My submissive side was letting her will take over me. Dominate me. She made a slight move with head to tell me to approach. I obeyed. She made me stop at two feet from her. Her body was so amazingly beautiful. Even her pose was perfect. The whole picture was going to make me cum.

As my Anna stuck the whole dildo inside herself again, I stroke my shaft with two fingers, all the way down. Then she did it again, two, three, and four times before I started ejaculating on her blankets, my cum falling between her round thighs. So close to her pussy that I felt a second wave of pleasure overwheling me. Such an orgasm I had never felt before.

What relationship were we beginning ?