In a lit basement; turned into a personal dunegon; was a woman strapped to a St.Andrews Cross. She was completely naked save for a thick silver chain collar around her throat. Slightly behind her, I stood double checking the manacles on her wrists and ankles. Once I was sure they were properly locked and not causing discomfort I stood up and looked over her. She looked beautiful standing there locked up with her arms and thick thighs spread. 5’1, straight brown hair, and thick and curvy in all the right places. “Are you sure about this?” I ask for what must be the 10th time now, but I wanted her to be sure. We never went as far as we were going to tonight but my stress had been building and I'd finally caved and asked her. For one night. I needed to let my darker side out and; baring her using her safe signal (a peace sign); she'd take whatever I did to her even if it wasn't something she was into but was ok with being done to her. She nodded her head before saying “ I trust you to respect my boundaries and to stop if I need to. Do whatever your darkest desires are to me and let it all out. I'll take it”. She looked back at me and smiled warmly before turning her head back to face forward. Slowly, I exhale and let go of the hesitation. No more thinking, just do what I've imagined on darker nights. I grab the deep throat gag and attach the largest rubber cock attachment, and then bring it around front. I stare into her brown eyes, seeing the trust in them, as I place the gag in her mouth. Once it's in place and locked so she can't talk; I head back around behind her. Picking up the bull whip, I get within range. For a few moments I just admire her pale skin and thick ass and thighs. She truly was gorgeous, and I'd always loved marking her. Now I was going to do that and more. By the end of the night she'd have a tapestry of welts, bruises, and scratches. I couldn't wait to see her like that. So I didn't. I began lightly whipping her. The “Crack” of the whip meeting her pale flesh was lovely to hear. Each strike caused her to twitch and moan through her gag. Slowly the lines started appearing on her back and ass; light red lines in crisscross marks. They started getting redder and more numerous as I increased the pace and strength I put into each blow. At a certain point she screamed each time a strike landed on her, and was curling her hands and toes. Soon after I stopped whipping her, watching as she leaned against the cross. She was shaking, and sounded like she was crying lightly but hadn't used her signal to stop. Giving her back time to recover I place the whip back in its spot and instead grab the weighted nipple clamps. Shiny black metal ending in pointed claws, with metal balls attached; they looked painful. Before heading around to attach them I lightly traced the raised welts from the whipping I'd given her. Smiling as she jerked in response, I enjoyed myself seeing and feeling my work so far. After a few more strokes along her back and ass I head around to her front. She looks up at me and I see the pain in her eyes and the cloudy look she gets when she'sbin subspace. Though once she looks down and sees the clamps in my hands her eyes widen before jerking back to look at me. I just raise my eyebrow at her and wait to see if she uses her safe signal. When she doesn't after a few moments, I use my left hand to grope her tits and tug on her nipples. Her heavy breasts heave up and down with her breath, pushing into my hand as she moans. I enjoy their softness and her pretty pink nipples and large areolas for a bit. Then, one at a time I put the nipple clamps on. They bounce with her tits and pull her nipples down. She whimpers once their fully on, and it's a beautiful sound to hear. I grin at her as I pull out a plastic ruler from my back pocket. Her eyes widen in slight fear and panic, and she shakes her head. “Use your safe signal or stay still slut. Tonight you'll get no mercy from me. Your whimpers and screams are music to my ears. Your pale skin being marked and bruised is like a painting of my making. Once I'm done and have my pictures to remember this I'll fuck you like a good girl like you deserve. Till then, the art must continue.” With that said I start slapping her tits on the side with the ruler. Each smack causes her tits to jiggle and bounce, which causes the nipple clamps to do so as well. I watch her start to cry again and scream as her tits get redder and nipples get pulled hard. I keep smacking over and over until finally the clamps slip off. Her loud scream is muffled by her gag as her hard nipples throb and pulse. I grin and lean down and lick each to make them more sensitive to the air; which causes her to whine fiercely. As she leans there panting and trying to recover I grab the clamps and return them and the ruler to their spot. Thinking to myself; “Now. Time for those holes to enjoy some attention too”. Grabbing the lube, and a large plug, I walk over behind her. Soon I'm caressing her thick ass. Squeezing, slapping, and enjoying the feel of it over filling my hand. Not to mention the jiggles it makes as I play with it. Once I'm satisfied, I slowly pour the cold lube on her asshole. She jumps lightly from the shock of the cold lube dripping down her crack but otherwise stays still. Slowly I finger her ass with first one, then two, then three fingers. It's warm inside and I feel her ass tighten around my fingers as she starts moaning slightly. Once it's stretched enough I pull my fingers out and lube the plug. I watch as the lube drips from the large plug as I place it to her ass and push it in. We'd been training her ass for awhile so it didn't take to much effort before it'd slid in fully with a slurp sound from the extra lube. Sliding it back out I watched as her ass stretched over it before pushing it out and leaving her ass gaped. Slowly I repeated this, over and over till her ass stayed gaped open. Then I walked back and swapped it with one that'd be able to be locked inside her and came back. “Now here is where you're going to truly feel inhuman slut. I'm gonna slide my cock in your fat ass and piss deep inside you before locking it in. Then I'll allow you the gift of my cock and cum in your cunt as you feel my piss slosh in your ass. Once I'm done, you'll be untied and squat in front of me as you clean my cock and let my cum and piss leak out of you like the filthy Sow you are”. I wait for you to nod before I slide my cock inside in one thrust, the warmed up lube enough to easily get me in. Groaning I release the piss I'd been holding in and felt it pour into her. Once empty, as quickly as possible I slid the cold metal plug inside her and expanded it till her ass didn't leak my piss and locked it in. After a quick cleanup I used some lube that made her more sensitive on my cock. When I was ready, and without, warning I thrust inside her already dripping wet cunt. She screamed in pleasure/pain as she was thrust forward as I slammed into her welted ass. Groaning in pleasure I continued thrusting. I could feel the plug rubbing my cock through the lining of her walls, and how soaked she was getting between the lube and me thrusting into her. Not able, or willing, to contain the urge I slapped her ass hard repeatedly as I fucked her hard and fast for my pleasure. Her muffled screams sounding out like music to my ears, I kept fucking her roughly even as she squirted and only stayed standing thanks to her manacles. Soon enough I felt my cock throb and pulse until I unloaded deep inside her cunt. Still wanting to leave one last mark I bit down on where her neck and shoulder met until I drew blood. Again she screamed and squirted as I left my cum deep inside her aching cunt and my mark in her flesh. As we recovered slowly I licked my mark on her neck and grinned as she shivered. When we were ready I unlocked and released her from the cross and gag. After which she squatted on shaking legs and cleaned my shaft. My cum dripped from her abused cunt and my piss from her gaping ass. “Good Girl. You did amazing taking my darker desires like that. I'm proud of you”. She looks up at me and blushes and grins. “And I’ll make you proud again next time"