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There were a few acts Slade never assumed he would commit, but after a month of non-stop experimentation with Alex, Slade doubted there was a kink out there he wouldn't find interest in. Alex had consented before the two of them had headed off to bed to allow Slade to fuck him in his sleep. It was the third time this week he had consented to such an act and even prepared himself in advance. He had come to love waking up with Slade inside of him or full of Slade's cum, with the anal plug he was wearing to bed stuffed back inside of him. It would be a lie to claim Slade didn't find it attractive, especially when Alex would carry his fluids around inside of him for the rest of the day only for him to use them as lubricant later that night, but as Slade awoke this particular night, he found himself in the mood for something else.
Slade wanted to fuck Alex, but he was tired. He had had a rough day at work, and all he wanted to do was sleep, so when he woke up with a different kind of need, he didn't see the problem with taking Alex up on his offer to use his hole as he pleased. His cock was hard, and his stomach ached with a need to piss, so without much thought, he carefully removed the anal plug and started to ease his way into Alex. He was thankful Alex had used a generous amount of lubricant and had decided to sleep on his stomach, as it made it much more convenient for him. The warmth around his cock felt nice, and as he found a comfortable position, he started to use Alex as his personal urinal. It was much better than getting up and going to find one.
Slade let out a small sigh as he relaxed and let his stream start. He did his best to keep it slow as he filled up Alex on the inside. It took a while for him to finish, but once he did, he was able to see how Alex's stomach had become distended with the fluid. He almost wanted to reach out and touch it, but he didn't want to wake Alex, so he pulled out as gently as he could and placed the plug back inside him. A few drops had spilled out, but it wasn't too much to be concerned about, so he went back to sleep. He felt better and slept like a baby because of it.
“Fuck.. Slade, what the fuck!” Alex cursed as he woke up and felt how distended his stomach had become, unable to ignore the pressure inside him or how full he felt as he sat up in bed. “Did you.. What the fuck?”
“Hm? I had to piss.. You were there.” Slade responded in a too casual manner as he rolled onto his side to face Alex, letting out a long sigh as he reached out a hand to stroke Alex's stomach. “I kind of like this look on you.”
“You pissed inside me?!” Alex asked in disbelief, not bothering to hide how upset he was as he dragged himself out of bed. “Do you know what kind of issues that can cause?”
“No more issues than me coming inside you.” Slade reasoned with a half-hearted shrug as Alex waddled off towards the bathroom, not bothering to hide his smile as piss dripped onto the floor from around the plug. “Where are you going?”
“I'm going to take a shower!” Alex called back as he slammed the bathroom door shut, deciding not to let Slade in, if only on principle alone. “You can clean the sheets and the floor!”
Slade knew that he probably should have talked to Alex about the whole watersports kink before he decided to try it, but between how Alex looked and how he walked around full of his fluids, Slade knew this wouldn't be the last time he tried it. If Alex didn't want it inside, he could just piss on the body of his face or inside his mouth, even. He knew Alex needed to drink more water, and now he would make sure of it. He drank enough for both of them.