My Sister is My Master

I wake up , during the night. "What a nightmare heh..." Looking at the time i notice its too early to wake up at all. "Oh well...." yawning i decide to go the kitchen , everything was silent , and dark , all you could hear was cars racing around our street. When I get downstairs I head right into the kitchen to drink a glass of water. I didn´t bother to open anything so I sat down and rested. Something was strange , "I don´t usualy wake up this early..." , weird voices could be heard from upstairs.I wondered what can i be ? Continueing to sitting , the voice gets louder and it looks as its..." Sister? Maybe she a nightmare as me, maybe I should check it out..." The more i go upstairs I hear the voice louder and clearer , as well light was shining from my sisters room. I took a peek and froze , as i saw my little sister masturbate. It was weird to me why she would do it . Watcher her turned me on , mummbling "This is bad...." she looks my way and stops , and I get scared. Just when she jumps on her bed. " I , I , It´s not what you think Brother!" she and me as well get all red and I reply " I , I didn´t see anything..." , "You saw me do it , with this thing in my hands didn´t you?..." she raised a small pink ballon type thingy , it was dark so i didnt see a thing. "Come on brother , you actualy liked it ..." poiting at my bulge i notice it myself. " No , its not what you think it is!..." "You can tell it someone else brother , come here!" once i came closer to her she said "Kneel before your Princess you slave !" half alseep i did as she said "You dont have to shout you know?". I yawned , i should had done that , my sister smiled , giggled "Your wide open!" then she showed that ballon thingy into my mouth making me choke a bit just about i fell back she put a tight collar over me "And what can you do now? Slutty Brother , you like it dont you?" sme smirked stepping on my knees , while brabbing the collar on me "How about you just stop resisting when you like this brother, i can let you have my body but only , if you become my pet slave and beg for it."