All characters are consenting adults.
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If you have not read parts 1 or 2, you should know that my husband (whom I call Daddy as part of our power dynamic) has given his brother (whom I call "Uncle Brian") permission to use my body for his sexual release twice per day while his wife is away caring for her mother in Romania. I have consented to this (and secretly enjoy every second of it). I am not allowed to cum on Brian's cock, but my husband has agreed to give me forehead kisses and orgasms as reward for my cooperation each time Brian finishes using me and leaves.
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My brother-in-law (aka "Uncle Brian") is in my ass again. Today he decided he wanted to use me in bondage. Out in the garage, we have an old gynecological table with stirrups and everything. We keep planning to bring it into Daddy's playroom, but life gets busy, and it is still collecting dust out in the garage. Or at least it was. Until today.
As per the deal Brian made with my husband (aka "Daddy"), Brian can only use me while Daddy is present. Up until today, this has always occurred in my bedroom, with Daddy in the rocker. But now we are in the dirty, dingy garage, and Daddy is standing, leaning against his tool chest while I am bound in the gyno table, feet up, knees to my chest, my butt hanging off the edge of the table, and Uncle Brian balls deep inside my ass, thrusting hard while calling me a filthy whore. His dick is going into my ass so deep. It hurts a lot. But I cannot say how much it hurts, because there is a rag stuffed into my mouth that smells and tastes a bit like motor oil. All I can do is cry and take it.
"That's right, bitch. You are going to take all of my cock in that tiny little asshole of yours, and you are going to like it!," Brian grunts as he thrusts in and out of me, slamming the table against the wall. He is pulling my hips toward him for leverage and bottoming out inside me. "Take it, whore. You know you love my fat dick ripping your asshole open, slut!"
I remind myself that the name-calling is one of Uncle Brian's kinks. He loves me and says all kinds of nice things to me when he is not using my body to release his sexual tension. That said, I cannot wait for his wife, Candy, to get home from Romania. I am not sure how much longer I can be his toy twice per day in addition to being Daddy's 24/7 toy. I just want Uncle Brian to hurry up and cum so Daddy can give me forehead kisses and orgasms and tell me what a good girl I am for helping the family this way.
Brian senses my mind wandering, "Do you hear me, whore?," he commands. "I am going to pound this sweet ass for an hour, and there is nothing you can do to stop me," he says while forcing eye contact with me. I try to look away, and he grabs my face and stares me down as he plunges his dick deeper and deeper into my aching butthole. "That's right, slut. Just lie there and take it like a good little whore." He slaps my face and continues to ram himself inside of me, ignoring my tears.