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It was quiet in the house as Dean slowly woke up.
Or at least it felt that way but the firmly wedged earplugs were probably more to thank for that.
He took a steading breath in through his nose and stretched what little he could in this position, tensing and releasing the muscles of his shoulders. His arms were still firmly held in the binder they had been cinched into before being left alone last night and they would stay there until he was released later today.
If he was released.
The longest stretch he had gone was a full three days as punishment for coming before he had permission. Castiel really hadn't been happy with him for violating one of the first rules they had worked so hard on after Dean decided to fully commit to a sub lifestyle. The strictness of their routine had done wonders for his obedience but every now and then they would hit a bump in the road and Castiel had no problem reminding Dean of his place.
Now, Dean felt Cas brush a hand through his hair again bringing him back to the present as he realised what had in fact woken him. His heart leapt at the tenderness of the gesture as he resettled, content to wait to see what was in store today. Castiel's hand continued down his head tugging gently on the blindfold Dean wore, making sure it was still secure. He huffed a breath as his head was pulled back against the tight restraint of the posture collar that was secured to the stand he sat on.
"Shh baby, it's alright," Castiel murmured, even though Dean would be oblivious to the reassurance, hands moving lower to rest gently against the warm leather of the collar. They lingered there tightening for a second before moving away and Dean felt, rather than heard, the footsteps as Cas walked away from his side.
Dean's jaw was aching a little now that he was more aware; the dildo he had been suckling on overnight was one of the larger ones they used for this and the limited movement of the collar had meant he had had no relief from its width for the whole time he’d been asleep. He always missed it though on the nights that Cas would simply tape his mouth shut instead. The calming buzz suckling on it filled him with was always worth the pain later.
It wasn't long before he felt Cas’s presence again and next thing he knew his right earplug was being worked out.
“Breakfast,” Cas murmured, before replacing the plug once more.
So it was going to be one of those days then.
Dean felt a small movement in the dildo. A protein shake was being poured into the clear canister that he knew now hung above him. The tubing Castiel had connected allowed it to flow straight down to his mouth as he kept suckling.
Castiel's warning meant he wasn't surprised when the bland flavour hit his tongue so he didn't choke and easily kept up with the flow. He greedily gulped it down and figured Cas must have poured at least three full shakes in there to be going this long. The liquid seemed to never stop coming until suddenly he was sucking air through the dildo again.
Cas rubbed the swell of his stomach once he’d finished seeming satisfied with the feeding. He reached up to unhook Dean’s collar from the stand and guided his mouth back off the dildo. Dean let out a quiet groan and slowly closed his jaw rubbing his dried out lips together. A glass of water was placed against them and, despite feeling swollen already, the blissful coolness washing over his chapped lips made him bend towards it. Once the glass was empty and removed Castiel’s thumb ran across his lips, spreading the leftover moisture across them.
Barely opening his mouth Dean pressed his lips around the tip of the thumb trying to coax it into his mouth but Castiel withdrew, dragging the wetness down his chin before removing his hand completely.
Swallowing down the whine Dean sagged against his stand to wait for the next step of the routine. Wake, fill, empty. Rinse and repeat.
This was just the beginning of a long day.
Dean was starting to sweat a little, twitching against the stand that held him up. He was thankful for its sturdiness helping to ground him as time inched on. After the full morning being ignored and letting the liquid do its work, the need to piss was edging on overwhelming. But he had learned better than to let go.
Twitching again Dean whined as a jolt of need made him clench everything in desperate hope to hold on to his bladder. Sometimes it felt more cruel not to be gagged while he endured this but he knew that Castiel loved to hear the sounds he made - when the whines turned into panting and then eventually, always, to begging.
Without his sight or hearing it was harder for him to gauge the passage of time but seconds felt like they were drawing themselves out into minutes the later it became. Each moment he could hold on was a moment closer to the end.
The bead of sweat made its way down the side of his nose like a tear.
Not yet.
Castiel leaned in the doorway looking down at his beautiful boy trying so hard to fight the instincts of his body. This part used to be that hardest for Dean - between resorting to begging and then pissing himself when he couldn't hold back any longer - the shame had weighed on him at first but Castiel had found that repeated exposure had broken down those barriers until Dean finally realised the true point of this exercise.
In the end, he was not in control. Castiel was. And he would have control of every aspect of his person down to the basest of needs.
Taking pity on him, Castiel crossed the room to brush his fingers down his boy's flank, enjoying the jerk and subsequent groan it shocked out of him. He opened the drawer nearby and gathered the supplies he needed for this next step.
“Cas please,” Dean gasped out between heavy breaths, “please..please let me”
Any reply was pointless since he was still isolated by the earplugs but Dean just needed to say something, anything. He felt like there wasn't much time left before he broke completely.
Fingers lit onto the hard swell of his bladder and Dean sobbed as their pressure increased. He couldn't take much more and Castiel had to know it.
“Please!”
It felt like a miracle when a hand closed around his dick lifting it gently into a bedpan. It sat there limply and god he was so close now. So close to release but he had to hold on. Had to wait for that last permission.
Seconds were stretching out again as he panted, desperately on edge.
The hard slap to his ass made him yell as at last he was given the signal, one final jolt of pain to push him over and send him sobbing as he pissed in front of his lover. The combination of relief and release was euphoric. The high had him coasting along only faintly aware of the last throws of piss as his stream stuttered to a stop, bladder finally empty.
Dean’s limbs were shaking in time with his breathing as he came to the surface again, unsure how much time had passed since he let go. Castiel must have disposed of the bedpan and returned because both hands were on him again, brushing down his sides like he was a timid horse. It was intensly soothing after such a high. Dean let himself be lulled away.
Between one breath and the next the comforting weight of the dildo was returned to his mouth.
Again Castiel unstuck an earplug.
“Lunch.”
Liquid hit his tongue once more.