Testimony from my rubber slave

An icy wind was swaying the Bridge I was crossing that December morning towards my mistress's dungeon, yet I was not cold, quite the contrary, because under my clothes I had been ordered to wear my black latex catsuit, as well as an anal plug spreader...for she had warned me that this session would only have one goal: to have me fisted, whatever the cost!
Mistress Tess welcomed me with a predatory smile, her perfect body sheathed in a red latex catsuit, her wasp waist highlighted by a white leather belt matching her pumps...what a beauty!
I quickly undressed, keeping only my catsuit, then walked into her studio. She stopped me in front of the leather bed, she had placed 4 dildos there, all of which I should receive in order to prepare my anus for her fist: a long black one, a shorter but thicker black one, a long pink one even wider, and a last flesh-colored one shaped and the size of a fist! If she wanted to shake my confidence, she had succeeded...
A leather hood was quickly put on me, making me blind, a single hole only allowed access to my mouth. Tied very tightly on my back, legs and arms raised and spread, the heat was starting to rise! Tess had a surprise in store for me: she had kept her morning urine in a bowl and had since then soaked in it the thong that she had worn all night... It was shoved into my mouth, with instructions to dry it by my chewing. This immediately put me in a state of incredible excitement!
She removed my plug and I heard her smile as she discovered its tulip shape. I knew her, a Machiavellian idea had just sprouted in her kinky brain... But there was no time to think, the first inquisitive dildo made its entrance, easily, so she quickly moved on to the second. It was big, so I had to relax, but she knew how to do it, and I accepted it inside me with groans of pleasure. A few back and forth moves, then the thong that was gagging me was once again soaked in her urine, and put back in my mouth. I gasped, but swallowed this delicate nectar with delight. The third dildo appeared, bigger, longer, but the work on my anus was having its effect, and it quickly found it’s way deep inside me. So she smiled and said to me, let’s get down to business! The fist-dildo fisting was quite another challenge, and I had to work harder to relax my sphincters, and finally let it take possession of my ass. I was proud to have succeeded in this first step, and I was rewarded with a vibrating ring placed around my stretched penis.
Tess untied me, and made me sit on a sling, spread apart, the thong again dipped in the bowl of urine and put back in place. I couldn't see anything through the leather of my hood, but I heard her soak her hand with lubricant and open my ass...one finger, then two, then three, then 4, then 5, my anus was calling for her fist! She had to work for a few minutes, alternating back and forth moves with pauses as deep as possible. Feeling my last resistance giving way, she helped me by placing a magic-wand on my penis, this diverted my attention and she took the opportunity to introduce herself completely! My whole body was trembling, with excitement, with pleasure, with joy! A joy shared by my mistress, because yes, I now belonged to her.
I gradually got used to her fisting and she began to search me, while increasing the vibrations on my turgid dick. She knew that the orgasm would be quick, so she ordered me to cum: What a sensation that of my anus pulsing on her fist, my body arched with pleasure, my balls spilling the fruit of 10 days of masturbation without coming that she had imposed on me into the condom! She gently withdrew her fist, and left me like that for a few minutes, satisfied and happy. The hood was removed so that I could see what Tess had imagined when she saw my tulip plug: with a syringe, she took several millilitres of her urine, then my semen in the condom, and re-injected all this into my anus, immediately sealed by my plug.
I had to return to the hotel like this, soiled and soaked under my latex suit which I therefore kept under my clothes again.
A hug, a kiss and a smile of delight from my mistress, and I found myself outside. I returned to my hotel quickly, took off my clothes and slid the zipper of my suit to release my penis and my anus. I removed the plug which came out easily and for a good reason: it was completely covered with a mixture of urine, semen and anal secretions. This vision caused an incredible excitement in me, my penis immediately tensed, I could not resist pushing this soiled plug into my throat, sucking and swallowing these fragrant fluids, stroking my cock, and rapidly gasping with happiness in a second and equally powerful orgasm.
There was no longer any doubt, I now completely belonged to Mistress Tess!