It started out as a fairly ordinary day.
That is, if you consider it ordinary to find yourself kneeling, collared, on your hands and knees, naked, as your Mistress uses you as a footstool while she reads the paper. I was enjoying the sensation of her bare feet resting on my back, occasionally brushing my buttocks as she crossed her long, shapely legs from time to time. Sunlight was streaming through the window, warming the room, and the soft rustling sounds of her turning pages were lulling me into a drowsy state. There was a knock on our door.
"Answer the door, pet," my Mistress ordered, and moved her foot to give my butt a gentle push as she removed her feet. She had not told me to crawl to the door, so I use the opportunity to stand up, rubbing my knees to return more circulation to them.
As I approached the door, I suffered a brief qualm, glancing down at my unclothed body. I had no idea who was on the other side of that door β a neighbor? A delivery man? Someone selling something? It could be anyone. My Mistress seemed very nonchalant about my nudity. Trying to hide most of my body behind the door, I turned the knob and slowly opened it a tiny amount to peek outside. I knew that whoever was there would still be able to see my collar, but I hoped they would assume it was just an ornate choker.
I could not contain my gasp of surprise at the sight that greeted my eyes. Standing on our doorstep, smiling her great beaming smile, was Susan. What a fantastic surprise! Without hesitation, I threw the door wide open, and dropped to my knees to greet her. "Mistress Susan is here!" I called out. "Greetings, Mistress".
Barbara called out, "Come on in, Susan!"
Susan stepped inside, and the moment she did, I bent forward to her feet, holding each one between my hands, and lovingly kissing its instep. It did not even occur to me that the door was wide open, and anyone walking by would have a very good chance to see a naked girl kneeling, and kissing the feet of the woman before her. I actually doubt I would've cared very much, I was so happy to see Susan again.
Once I let go of her feet, Susan walked past me to greet Barbara with a big hug, leaving me to close the door, and follow. They then sat down on the sofa to chat and catch up with one another. Without being told to do so, I scrambled over before them, and again knelt down on my hands and knees in my footstool position. Without a break in their conversation, they both casually placed their feet up onto my body β Barbara's bare feet, alongside of Susan's feet, still encased in her lovely black leather pumps.
Susan asked how my training was coming along, and I blushed delicately as Barbara recounted some of our more lurid recent adventures. Since Barbara had kept me awake most of the night, amusing herself with me, I soon found myself dozing off in the warm sunshine.
I was suddenly awakened from my stupor with a sharp slap on my bare butt.
"Crawl and fetch some toys that will demonstrate to Susan your obedience to me, pet," my Mistress ordered. Since I looked drowsy, she went on to clarify her command, saying, "Obedience and acceptance of pain, that is. Some of my favorite things."
As the words sank in, I felt a familiar sensation. It was a blending of anxiety, humiliation, anticipation, and... pride. I knew that my submission was about to be tested in front of Susan, acting as an audience. While I did not exactly look forward to, or enjoy the pain, I was proud that I had never failed my Mistress. She had never done anything that made me invoke my safeword. I trusted her.
Crawling naked as instructed, I returned with several items. I had cording wrapped around my waist for easy transport. Clamped onto that cord, I brought the nipple clamps that are connected to each other with a chain. In my mouth I held a neurological wheel, with its gleaming tiny sharp spines. I was also able to bring a riding crop in my right hand as I crawled along the floor. Reaching the feet of my Mistress, I offered her the crop and the wheel. She took them, and also unwrapped the cord and the nipple clamps from my waist.
"Kneel up straight and prepare your nipples, girl," she instructed me.
Kneeling between her and Susan, I plumped up my nipples with my fingers, tugging and rolling them. As they stiffened, my excitement built. An excitement tempered with knowledge of the pain that was to come. Susan watched closely as I held each breast out for the bite of the clamps. I may have winced slightly, but I made no sound as each jaw was securely fastened to my erect nipples.
Mistress handed me the chain that connected the clamps, telling me, "Pull straight forward, keeping this chain level." Since these were clover clamps, pulling that hard on their chain made them tighten cruelly on my sensitive nipples, making me gasp slightly. I held my breasts in place as Mistress began looping the cording firmly around the base of each breast, trapping the blood in them. Gradually they ballooned, taking on a purplish hue.
"Let go of the chain, and arch your back, pet," Mistress demanded, holding up the neurological wheel. This position caused me to offer my now swollen breasts to the wheel's pricks. Mistress delighted in rolling the sharp tines all over my trapped, quivering flesh. Susan's eyes seemed to get larger as she drank in the sight of the gleaming spikes digging into my skin. My gasps got louder with each pass of the tool.
"Well done, my girl," Mistress complimented me. She put aside the wheel and raised the riding crop, saying, "Get in a good position to present your ass to me."
On my hands and knees, I turned sideways to her, and then lowered my chest and shoulders to the floor, pillowing my head on my crossed arms. I kept my ass up high, and separated my thighs, offering myself freely. Susan was certainly learning how obedient I had become.
The crop whipped out and cracked across my ass cheeks several times. At first, I was able to stifle my sounds. But the heat and pain intensified until I was crying out with each strike, weeping copious tears. But I never drew away or flinched. I submitted, and embraced the pain.
When Mistress stopped, I could tell I had pleased her. As a reward, she told me to fetch the suction dildo, and I did not even have to crawl to get it. The air currents washing over me as I quickly walked away to do her bidding helped cool my ravaged buttocks.
The dildo that she sent me after had been modified to not only attach to a flat surface with suction, it could also be tied, which came in handy when tied to the leg of a heavy table, like the one in our dining room. Following Mistress' instructions, I attached and bound it to one of the table legs there. Still obeying her, I went down onto all fours, facing away from it, and backed slowly up as she inserted it into my wet, slippery cunt, my legs passing on either side of the table leg.
Mistress unbound my tits, and unclamped my nipples, sending a flood of fresh agony through the tortured tissues. "There, there, my girl," she cooed as her tender hands now caressed my breasts, sending waves of soothing pleasure to contrast and replace the pain. "Now show Susan how well you can fuck yourself on that dildo."
I began rocking back and forth on the phallic object, feeling it alternately moving in and out, penetrating and stretching me delightfully. Emotions coursed through me: pain, humiliation, excitement, mounting pleasure as I changed angles and rhythms, closely watched by the two women. Hearing their comments about what a needy, horny little slut I was. All too aware of the sounds and smells I was generating as I fucked myself into a frenzy for their visual gratification.
Sensing a question that was rising fast in my mind, Barbara told me, "Yes my pet. You may cum. Put on a good show for Susan β cum as many times as you can."
It did not take long.