Yure and Severo are leaving when Severo writes something on his sign and shows it to Marcus. It reads: "You had a little too much fun making me mess myself." Marcus didn't understand what he meant at first until he notices he has a stiffie and didn't have to go. Why did that happen? After Yure and Severo leave, with Severo still upset and dirty, he wondered what that could mean. "Do I really like making people mess themselves?" He certainly was not into Severo's body itself. But something about making other embarrass themselves like that thrilled him. After all, it was his idea and he carried it on. His erection was still there, but softening, as he watched Severo go. What is going on?
So he decides to test it but who was he going to have fun with this time? Just then he hears a knock on the door. He answers it and it is Renato. "Prefect." He thinks. And just as Marcus is thinking up his next mischief, his erection firms up again. This time, however, Marcus covers his crotch with his wing. "Hello, Renny!", says Marcus. "Hello, uh, 'Marky'.", replied Renato. "Do you have time? I need help with my homework..." Renato is enrolled in school as well, but it's his first year. And he has not learned to read it. "I forgot about that." Marcus sheepishly admits.
Marcus gets his homework and some snacks and drinks for both of them. He uses the remaining laxatives in Renato's drink. Marcus’ penis is só hard that he wonders if he should get himself some underwear really quick. Since he is home and his penis is not big when flaccid, he was commando. But it would also be impolite to just leave Renato waiting. He focused on something other than the bubbling laxative in the glass of water and managed to get his stiffy to soften just barely. Then, he goes back to the living room, giving Renato’s glass of water.
Renato drinks his drink. "This tastes weird." Renato remarks, but doesn't think anything of it. Properly hydrated, or só he thinks, Renato starts to work on his homework, with Marcus. The routine was kinda odd to see: Renato would listen to the questions that Marcus was reading for him, then give the answers for Marcus to write. It’s an embarrassment for Renato, but he does not know how to read yet, let alone write. He is learning, though, with aid of Álisson. Like all training he does with Álisson, though, things tend to be painful. If Renato fails to read a period, he gets a spanking, for example. But Renato puts up with it for sake of self-improvement.
After working for 3 hours straight, Renato still didn't seem to look like he had to go, even though he did. Renato could feel his belly churning and filling, even visibly. But he just stoically ignored it and waited with uncommonly seen patience. Renato’s training and self-discipline made him an iron cub. "Did the laxative not work?" Marcus thinks. "Welp, thanks for the help but I think it's time for me to get home.", says Renato, with the base of his tail trembling discreetly. "NO!" Marcus exclaims suddenly. "I mean, it's too dark for you to walk home. Why don't you stay the night?" Renato rubs his belly. "Is your bathroom still out?" Marcus nods. "Oh... alright. I'll stay."
Renato felt like he was gambling with fate now. Could he really wait until the next day? Plus, he is a bedwetter. Marcus knows that, which makes Renato suspect a little… Why would Marcus offer a bed to a bedwetter for the night? It was his bed and he knew Renato would soak it. “Are you really sure you want me to sleep on one of your beds?”, asks Renato. “Absolutely!”, Marcus replies. “Most certainly I do!” Renato then warned: “I wet the bed at night, as you know.” Marcus nodded. “And I told you not to worry about it.”, said the cockatrice, referecing the last time they had a conversation like that.
As they get the bedroom ready, Marcus notices that Renato is showing more and more signs that he has to go. Renato’s belly is now growling audibly. You don’t have to stay close to Renato to hear it. Renato’s tail was moving up and down from time to time. He looked tenser than usual and was sweating. When Marcus notices a chance, he takes it, pouncing on Renato and pinning him down. "What are you doing? Are you trying to make me spray?" Renato remarks. "No. Worse." Marcus smiles. Renato groaned, as that pounce nearly made him lose what he was carefully holding secretly.
Marcus starts to push on Renato's bladder. "Hey, no! Stop!", Renato yipped. He struggles to get out from under him but to no avail. Marcus continues pushing on Renato’s bladder, but Renato still doesn't leak. "You seem to be a bit better a this then Severo was. I guess that means more fun.", said Marcus. "What do you..." Renato notices Marcus's pecker. "Wait! Are you doing this for pleasure?", Renato asks. Marcus nods.
"I guess I should move to your butt then. You seem to be as good at holding your pee as Yure." He moves his hand to Renato's diapered butt and starts to rub it. The spray he was holding back from earlier starts to pour into the diaper, causing the room to fill with a horrible smell. Renato blushes in embarrassment. Contrary to popular belief, skunk spray is a volatile liquid, not a gas. Surely, it can make a cloud, but it’s basic form is liquid. With a diaper stained with skunk spray, Renato reeks horribly. And the smell can be felt in the entire room, due to how volatile the spray is. The windows are closed and só is the door.
"Don't worry. That little spray will be mild compared to what you're about to let out." Marcus smirks. Renato puts his tail between his legs. Marcus tries to move it but Renato won't have it. Renato caught on that Marcus wanted him to soil his diaper. And then he has a flashback about that water glass from earlier and how it tasted. It was laxative. Renato groaned, now feeling quite mad, but also challenged.
Marcus stops trying to move the tail, but still pins Renato down. "What started as a revenge plot for Azul became a question of my fetishes. I thought that I only liked role-playing and this could be part of it but I have to figure it out and even though your fighting makes this more interesting, I prefer not to resort to more... painful means.", said Marcus. “So, this a learning experience for you?”, asks Renato. “But it’s still immoral, what you are doing, without asking me first!” Marcus then complains: “If I asked you ‘hey, could you fill your diaper with poop?’, of course you would not listen!” Marcus was right. Renato is always very clean, because bodily secretions do turn him on. Renato is very ashamed of that fact. Even the skunk spray he let out minutes ago was making his penis tingle and get half-erect. Renato was not going to surrender to his lower urges, however. Not in front of Marcus. Preferably not ever.
Renato keeps his tail firmly between his legs. "Ok. I guess I'm gonna have to try a different approach at this." Marcus starts to rub the front of Renato's diaper. Renato was already getting an erection from the smell of his spray but Marcus's rubbing was making the front of his diaper tent. The urge to masturbate starts to become apparent, adding to his bladder problem. Marcus continues to rub, and Renato's urge gets stronger and stronger until finally his wood reaches a climax. So much for his resolve to hold onto his seed! Now he just embarrassed himself twice in less than an hour! He starts filling his diaper with white stuff, but this only causes Renato to leak a little. 
"Severo was easy for you because he has never had too much holding experience. Because of my...problem, I have been training my bladder to hold for long periods of time. I even hardly wake up wet anymore. That isn't to say you probably couldn't, in some way, make me pee but I could probably hold it all night by normal means." Renato was being sincere. He “hardly” woke up wet and could “probably” hold it all night. But accidents still happened more often than it did in the general population...
"Anyway, I somewhat understand your situation which is why I haven't just used my power to get you off. But I still am not gonna make this easy on you.", says Renato. As much as Renato is feeling wronged by that, he still regards Marcus as his friend, and his best friend, to top it all. Marcus just wants to figure himself out and is just using the means he has at disposition for it. Nonetheless, that was an evil deed and Renato, if he was unwilling to punish Marcus, would at least keep the cockatrice sexually frustrated.
"Ok. Let's try this." Marcus plucks one of his feathers and tickles him. Renato tries to keep his pee held in but pee starts to spurt into his diaper. "There we go." Renato groaned, still trying to stop the flow, but tickling was one of his weakenesses, perhaps the only one. Renato farted on his tail, due to the intense laughter. Even though Renato lost his urine, his poop was still being contained, despite the fact that his body was still producing more. All that waste was fighting for space in Renato’s bowels, causing his belly to bulge out further. But Renato’s tush hole was keyed up, thanks to Renato’s strong resolve.
Marcus takes his tailfeathers and starts to tickle him more vigorously. Renato can't help but laugh and squirm, causing more pee to come out. "Now let's try both at the same time." With one wing, he starts tickling Renato while with the other, he starts rubbing the now wet tent. After a few minutes of this, cum starts to fill his diaper a second time. Renato feels a lot of pleasure, but also shame, due to him enjoying something he was not supposed to.
"It won't be long now but I actually want to see you poop first?" At that statement, Renato notices Marcus has a full boner now. "You really do like this, don't you? You like role-playing as a torturer.", Renato commneted.
Marcus smiles a big grin. Instead of trying to move Renato's tail, he shoves his wing into the back of Renato's diaper and starts rubbing the side of his butt. Renato's stomach rumbles loudly as he lets a few small toots escape. Renato shoves his tail further between his legs, signaling to Marcus he was making progress. He continues his rubbing. Renato's tail starts to try to flag as Renato tries his hardest to keep it lowered. Renato is panting somewhat. After peeing só much and having two orgasms in such a short time span, Renato’s body was getting tired of containing the massive tide in his growling belly, that keeps making ominous sounds.
The belly is growing further and rounder. A small red dot appears close to the navel and grows wider as more poop comes and fills the bowels more. The hole is trembling and dampening, with something that Renato sincerely hopes are sweat droplets. But Marcus’ wing is feeling something eles, not sweat, but a little bit thicker than that. Renato keeps holding, but the laxative seems to be at it’s peak effect now. It’s been almost four hours since he took the laxative and most people would not be able to hold it in, under laxative effect, for more than one hour and a half, at the most optimistic estimation. The sphincter was struggling to stay closed, but it was oozing slightly and leaking into the rectum, causing the mess to trickle to the anus and further moisten it. Marcus, still pinning Renato, spread Renato’s legs a little with one wing. The pressure on the tail was uncomfortable and the legs spread meant that Renato no longer could keep the tail from flagging up.
After a little more rubbing, Renato's tail finally flags as the diaper fills up with mostly soft, but a little runny too, poop. Marcus laughs happily as his boner finally reaches its climax and he himself starts to cum. Marcus is surprised by the sudden orgasm and loses balance, falling on his butt.
Renato tries to keep holding his pee but because of his butt relaxing, it causes his private to relax just long enough for the Waterworks to start. Soon, Renato's diaper was being flooded with pee. After a few minutes, Renato could feel his diaper start to tear and eventually, rip a big hole, causing poop to start pouring onto the floor. The diaper eventually falls off, leaving Renato's naked, but very dirty body on display. Renato's penis was not done softening, so it was half-hard still. With the display, Renato's penis softened. Marcus is a trembling wreck now, that he is enjoying his afterglow. Renato, however, is not pleased…
After Renato finishes, he aims his butt at Marcus and sprays him. "That's for causing me to ruin my diaper. I hope you're happy." Marcus ignored him, still filling his diaper with cum. "Well, I guess I'll go clean myself up." Renato waddled to the shower leaving Marcus with the mess on the floor. Marcus finally snapped out of his trance and realized that Severo was right. He was into making others go.