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Vax woke up in the night, feeling the warmth of the blankets that he'd wrapped tightly around himself, but more than that, another pressure. The growing, gnawing feeling that had awoken him to begin with, bulging his lower abdomen slightly as he tried to untangle himself from the mess of sheets. Each little movement shook him, making him feel like he was going to accidentally let go and make a big mess, one that he'd surely have to answer for, but if he didn't get out of bed, that would happen either way. He reached down with both lower hands to cup his groin, grinding into his palms inadvertently. He couldn't control the roll of his hips, but at least the growing hardness would make it easier to hold it in, just until he got to Mami's room.
On his way out of his bedroom and through the hallway, he squeezed his thighs together around his hands and crotch, his walk becoming more of an awkward waddle as he made his way through the dark with one hand on the wall. He didn't want to turn on the light, he would wake everybody up, he didn't want to inconvenience his Papi or Tía. It still embarrassed him, still getting this desperate in the night at his age; he'd had accidents in his bed more than a few times. Papi always said he would grow out of it, but now he was getting mad at Vax for never doing that. Why couldn't he understand, he can't help it? At least Mami was understanding; Mami was kind. Mami had offered his help when Vax needed it.
Coming to a stop just outside the double doors, Vax glanced from side to side. It looked like the guard girls weren't here tonight. That was good, it would make this less awkward. He shuffled from one foot to the other, trying to hold back from leaking through his pyjama pants and on his hands while he reached out to rap his knuckles lightly on the wood. After a few seconds, the door creaked open just slightly, one pink eye looking down through the gap at him.
"M-mami," Vax nervously squeaked out, shaking on the spot as he tightened his grip on the front of his pants. "I..."
Valentino smiled warmly as he stood naked in the doorway, reaching out to pull Vax into his strong arms, against the ruff on his chest. "Shh, mijo, mami's got you," he purred and lifted Vax from the ground with his lower arms, his son's legs wrapping around him and letting him feel his hardness against his stomach. "Oh, baby...do you need Mami's help with this?"
Vax looked up from Val's fluff, eyes tearing up, and nodded slightly with his eyes pulsing white uneven circles. "Please, Mami..." He ground against Valentino's tummy, trying to lower his hips. "I h-have to pee...please..."
"Pee?" Val repeated softly and carried his son slowly over to the bed, nuzzling into his neck and placing little kisses as he held him. "Mami just thought you were feeling horny."
Tightening his arms around Val as his father laid him back on the silk sheets of the heart shaped bed, Vax averted his eyes slightly. "...both..."
"Aww," Valentino cooed and placed his top two hands on either side of Vax's screen, the lower pair moving down to tug at the boy's waistband. "How do you want Mami to help you, bebé?"
Pink pixels spread across Vax's screen, squirming under Val when he was asked the question. "Wh...how...?"
"Mami can't help if you don't tell him how. Come on, tell Mami what you want."
He hadn't expected Mami to make him say it out loud. His face overheated as he looked up and started speaking in a trembling voice. "I w-want to pee in...Mami's special place..."
"My sweet boy," Val whispered and pulled down Vax's pants and underwear, letting the erection spring free and rub against his inner thigh. He smiled and used one of his bottom hands to grasp Vax's length, the contact immediately making the young man shiver. "So sensitive... you're so cute," he purred and angled his hips forward as he guided Vax's dick to the space behind his own, poking the tip at the entrance to his pussy. With his other low hand he wrapped his fingers around his cock, stroking himself while sinking down on Vax's head. "You want to go potty inside Mami?"
Vax hissed a moan through his teeth as he felt the warmth start to engulf him, taking him in inch by inch. "Yes, Mami," he gasped and moved his own lower arms to grab onto Valentino's hips, wrapping the upper ones around his shoulders and leaning up into his Mami's embrace. As he lifted himself closer, he rolled out his tongue and pressed it to one of Valentino's nipples before taking the skin around it into his mouth and gently sucking as his teeth grazed the edges.
Valentino's walls clasped around Vax and he drove his pelvis down, taking his son in completely. "Go ahead, mijo," he breathed out and pulled Vax against his chest, encouraging him to suck harder. "I want to feel you fill me up~"
Wrapped in the embrace with his beloved Mami, the familiar comfort of his tit in his mouth as he raised his hips to push into the same hole that he had once come out of, Vax whimpered and tried to relax his muscles. It was difficult at first to strain against his hardness, but he had to go so bad already, it didn't take long before a trickle started to spill out of his tip. Once the first few drops escaped, he found his bladder quickly draining out into Mami's cunt. He could feel the warmth of the liquid filling the tight channel, the way that Valentino twitched and moaned at the feeling of being filled with the heavy stream making him buck his hips up even as he was still peeing.
"Mami," Vax pulled off of Val's nipple and moaned while pissing deep inside of him. The fluid overflowed, rushing back out around Vax's dick and soaking his crotch and thighs, as well as the bed underneath him. It felt so good, even though he felt bad for making a mess of Mami's pretty silk sheets. Minutes seemed to pass, though it was really only seconds, and the stream subsided, coming to a slow stop.
Valentino's thighs were shaking at either side of Vax, his tongue hanging out of his mouth as he panted. "Oh, mijo," he said, "that felt so good. You had so much for Mami." His hand stroked his own erection faster, aiming the tip up at Vax's screen and starting to grind forward, bouncing his hips up and down. Vax couldn't help but start to wriggle underneath him at the sudden onslaught of stimulation, breathing heavily and whining while his Mami rode him hard. "Stick out your pretty tongue for Mami...I'm so close, cariño."
"Ah, m-me too," Vax forced out between his breaths and opened his mouth, rolling out his long pink tongue to present it. In just a few minutes more, he saw the spurt of white shoot forth from his Mami's tip, some landing on his tongue, some on his screen just under his eye. He closed his eyes, curled his tongue inward and swallowed, expecting that to be the end of it.
But a sudden gush of liquid suddenly started pouring over his screen, neck and chest, and when he opened his eyes again he confirmed it- Mami was peeing all over him! His hands tightened on Valentino's hips as he drove his own up, burying himself to the hilt and climaxing inside while feeling the hot urine cascade over him.
When Vax's orgasm had passed, Valentino had already finished emptying himself out, and collapsed on top of his son in the puddle and stain the two of them had made on the bed. "Such a good boy," he praised, running his hands over Vax's body while they lay limp.