Fucked my Sister Anonymously

I've been thinking about it a lot lately and I feel like I need to talk about it.

So, this last Halloween was the last Halloween I spent at home before I moved out. Not because of what I'm about to confess, just because I was planning on moving out anyway. But, since I've said this was Halloween you can probably kinda guess where I'm going with this.

I decided I was gonna spend it out with friends, and these friends were going to a party, though pretty much as soon as we got there they both fucked off and got drunk.

I grabbed a costume on our way there, an executioner costume with like a full hood.

While I was there, I ran into my younger sister. She was wearing a costume mom and dad definitely wouldn't have been okay with, it was basically just a red thong, pasties, fishnets, high heels, and a pair of demon wings and horns.

When I realized it was her I was stunned. I approached her, I don't know what I was going to say but I felt like I needed to step in and say something to her.

What happened instead was that she thought I wanted to fuck. She didn't know it was me, and every time I tried to say something she put her hand over my mouth through the mask and told me to shut up because she liked my costume better if I didn't say anything.

She dragged me off to the bathroom and before I knew it she had my dick out.

Between me realizing what she wanted and her pulling my dick out I was fighting myself. I was trying to speak up and get her to stop, but I already didn't know what to say and everything was happening so fast. And part of me realized that since she didn't know who I was, maybe she didn't have to find out.

Once my dick was in her hand that was the part that won out.

I stayed quiet the whole time. She took it into her mouth and got me hard, then she got a condom out of a trick or treat bucket she was carrying around and put that on me.

She took off her thong and bent over the sink, and I don't think I'll ever forget what she said. "Please fuck me to death Mr. Executioner." I thought it sounded like some cheesy porno line, but it worked on me. My heart was pounding when I put it in. I mean I was wearing a condom, but I was still inside my sister's pussy.

I took the bait. She said she wanted me to fuck her to death, so I fucked her harder than I'd ever fucked anyone before, and I didn't stop until I filled that condom.

Now, I don't think I lasted all that long to be honest, but she didn't seem to care. I took the condom off and tied it, and then she took it from me and handed me her thong and said "trade ya!"

She put the condom in her mouth, put on a glittery red miniskirt from that bucket, and went back out into the party. I left and went home, and I saw her the next morning like nothing had happened. And I still have that thong, I brought it with me when I moved.