Brother finds his sister tied up and takes advantage of her

“No mommy, please don’t tease me. You know that’s way too small.”

I looked into the toy box and did not see anything that was bigger around than this dildo. There was a big bottle of lube sitting on the nightstand next to the bed. I pulled the dildo all the way out. The thing was 18 inches long and the bottom half was streaked with shit. I took the dirty end and put it to her lips. She immediately stuck out her tongue and started licking and trying to suck on the end. I pushed about 6 inches of the dildo into her mouth and she started moaning.

I then grabbed the bottle of lube and squirted some on and into her gaping ass hole. I then squirted some all over my hand. I pointed my fingers and easily pushed four of them into her butt. I worked them around until I was able to add my thumb. I could hear her squealing a bit so I reached down and pulled the dildo out of her mouth.

“Oh mommy, your fist is so big. Please destroy your little girls shit hole.”

Hmm, she thought it was big now? I still hadn’t even got my whole hand in. I knew that my mom’s hands were a lot smaller than mine. My sister was in for a big surprise. I squirted some more lube over the widest part of my hand and on my wrist, then I started twisting my hand and pushing with more force. Suddenly, my hand disappeared into her ass. I immediately made a fist and was able to push in a couple more inches. My sister had gone totally silent but was breathing very fast. I stopped moving my arm and felt her loosen her anal muscles.

“Oh mommy, you feel much bigger today. Could you please use a little more lube?”

There was that please again. She certainly was polite even when she had a fist in her ass. I grabbed the bottle and squirted more lube around her hole and twisted my wrist a bit to work it inside. She started to moan as I slowly started pushing and pulling my fist in and out of her ass.

“Faster, deeper” was her only comment.

I started really pushing in hard. I was hitting something inside but I really had no experience with this so I didn’t know if I was doing any damage to her or not. I started pulling out further each time, almost getting my knuckles past her sphincter. Finally she loosened so much that my hand actually came out each time and the easily went back in about 8 inches.

“Please bite my clit, make me come!”

I had some experience going down on women, but none of them really wanted to have their clit bitten. I bent down and grabbed her clit with my lips. I squeezed it and pulled on it as hard as I could without letting it go.

“No, no, don’t tease me, bite it hard like you usually do.”

Ok, maybe she did want it bitten. I still didn’t know how much force to use, but I was able to get her clit between my teeth and slowly bite down on it. She came instantly. Her ass closed up so hard on my wrist that I thought my arm was in a vice. She didn’t squirt but liquid came running out of her pussy and ran down her belly to her tits. She was screaming so loudly that I was sure that the neighbors would have heard her if they were at home.