I got to the top of the stairs and saw that her door was wide open. Hoping that she at least had her back to the door I walked by and quickly glanced in. That one glance did it. I froze in my tracks and my jaw dropped. My sister was on her bed and to say that she was a little tied up with what she was doing was the biggest understatement of the year.
There she was, tied to the headboard of her bed. Just her head and shoulders were on the mattress and her back and butt were tied to the headboard with her ass sticking straight up in the air. Her legs were tied by the ankles so that her feet almost touched the mattress. Her left hand was attached to the headboard with handcuffs. Her right hand was not tied and was currently busy rubbing her extremely wet pussy.
I was going to say something but realized that she probably could not hear me. She was wearing a leather hood that completely enclosed her head. Her hair was pulled thru a hole in the top of the hood and the ponytail was then tied by another rope to the end of her bed. There were closed zippers over both of the eye holes and there was some kind of gag device attached to her mouth. Her nose was sticking out of the hood and it was the only part of her head that was actually visible. There was a clear plastic tube that came out of the front of the gag and went up to another brown tube that came out of her pussy. I could see some yellow fluid in the clear tube.
I couldn’t help myself and slowly walked into the room, picking up more details as I got closer. There was a large box sitting on the floor that was open and it was full of sex toys. I recognized the box as something that was always up on my mom’s shelf in her closet. It had a lock that I had never been able to open so I had never been able to see what was in it. I knew now.
It was then that I noticed what looked like the head of a cock sticking up out of my sister’s ass. As I bent over to get a closer look I also noticed that the tube in her pussy was actually a catheter inserted into her pee hole and realized that she was drinking her own piss.
I looked again at how she was tied up, trying to decide if she had done it to herself or if had been done by someone else. I saw another set of handcuffs attached to the headboard in a position that could be used to attach her right hand. I also saw that there was a rope end that was dangling in reach of her hand that looked like she could pull it and release herself from the headboard. If her right hand was put in the handcuffs, she would never be able to get out of it by herself.
Up until this point, I really hadn’t looked at my sister’s body, I was just looking at the situation she was in. I had never really thought of her in a sexual way. She was my bratty little sister and that was that. Now I started really looking. She was still rubbing herself and I started my exam there. Her pussy was shaved clean and she had a very large clit. It was much bigger than I had seen on any of my girlfriends and her lips were very long. Each pussy lip had been pierced twice and had barbells installed in the piercings. There was no hair around her ass hole which was obscenely stretched by the dildo that was sticking up out of it. With her upside down, I couldn’t tell how big her tits were but they looked pretty big and she had large nipples that were currently hard as rocks.
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