It's my sexy big bros birthday today and I am going to trick him and surprise him! I start out by making him a card that tells him to lay down in his bed and put the blind fold on that I have left him. I explain that he isn't allowed to peak and that this is a relationship exercise so no cheating! I sign his girlfriends name and leave it on his desk with a candle. He plays right into it. He gets on the bed and puts the blind fold on and I come into the room. I pull his pants down and start to suck him off. I deep throat him and I grab the cuffs I left tied to his bed and attach them to his wrists. I continue to suck him off and then I pull of the blind fold and watch him squirm and freak out as he realizes its his step sisters mouth he has been fucking and enjoying soo sooo much! He ends up quickly fucking me and cumming inside me even though I told him not to I even turn around and show him his cum dripping from my pussy..
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