She opened the door and walked in very slowly and despite my orgasm, my cock never went totally soft. As we walked in I felt the blood flow back into my cock in a rush.
The warm feeling of my sticky cum mixed with her pussy juice running down our legs, only made me want her more. We walked in the door and with each step I was pumping my cock in her.
This time I did not even try to hide the fact I was trying to fuck her hard. The whole costume smelled of sex and cum. She was moaning louder as she closed the door. We walked toward the bed me fucking her with each step. My hips were rocking back and forth like a mini machine gun. Each stroke was so small but as fast as I could go.
She moaned louder not caring anymore as she bent over the edge of the bed. Her head was resting all the way down so her pussy was pushed up against me. This allowed a bit more room and I was pumping her with all I could manage. She began to moan loudly – no longer even trying to be quiet. As moan after moan left her lips I heard the one thing that made me go insane with lust.
“Ohhh don’t stop. Fuck me, baby brother, fuck meee! Oh God yes, please don’t stop,” she screamed.
“Fuck me, use me, take me just don’t stop!” she said as her voice broke in gasps.
All thought was gone as she bent over the bed and started rocking her hips to meet my forward thrust. My cock slipped deeper in her and she let out a gasp. The more she bent over the deeper I went in her until I could feel my balls slap against her clit. She let out a loud scream of sexual ecstasy and had an orgasm that seemed to keep building in intensity. She shook so hard it was like trying to hold on to a bucking bronco, I felt and heard the material in the back start to rip.
The back gave way and I pulled out of her pussy. The sudden change caused me to slip. I tried to steady myself but lost my balance and fell over on my ass pulling her down with me. I felt a stab of pain on my cock for a split second as she fell on me, then it felt warm and tight. I realized my cock had slipped in her ass. The tightness of her ass and the moans from still lingering orgasm were more than I could take.
In a split second we both realized what had just happed but were both too far gone to care. She tried to get back upright but it only made my cock sink in and out of her ass. I was fucking her ass! Three times she tried to get upright but each time she only managed to pump my cock in her ass. Before long I realized she was not trying to get up, she was lifting her ass up and down helping me fuck her ass.
“Fuck my ass baby brother, take my ass hard,” she screamed.
“You want my ass? It’s yours. Just fuck me hard. Sink that hard cock deep in my ass,” she said almost hysterically.
Those words were more than I could take. I felt my cock begin that last thrust as the cum boiled from my balls and exploded deep in her ass. She also let out a scream as her orgasm tore through her body. I think we both may have passed out. I woke up in a daze and felt my cock finally getting soft. It slipped out of her ass with a plop.
We both just lay on the floor for several more minutes before I started pushing my back against the material. I felt it give again and heard the material rip. My back was out of the costume. I climbed out slowly, my boxers were covered with cum and pussy juice. As I looked down I could see my cock was still semi hard and poking through the fly in my boxers.
I was covered in sweat and my hair was dripping wet. I rolled on my back and started trying to catch my breath as my sister worked her way out of the ripped opening. As I watched her climb out of the costume, I could see she was a bigger mess than me. Her hair was matted together and all in her face. She had lost her bikini bottoms and I could not help but admire her waxed, smooth pussy.