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Bowser found himself staring at his window, sweating bullets, in immense pain. The scent of sulfur permeated the room. How long would this so-called hero take to get here? Yeah, he wasn't supposed to start his heat cycle until later tonight, but why couldn't Mario just come earlier than expected. He promised the red-wearing brunette that he would wait for him, but that was proving to be a nightmare. What's more, he was getting his nice sheets soaked with slick. He could never have his minions wash this when they got back, he thought with an annoyed huff. He mentally thanked the powers that be that he sent his minions off to terrorize anything that wasn't the Mushroom Kingdom. That kept Mario free for him and kept him out of suspicion for his usual antics.
While in his thoughts, Bowser heard the door slam open. “I ran here the moment I could smell the sulfur stronger than usual at the door!” Mario said, rushing over to the Koopa king who was nearly writhing in his nest.
“Yeah…I was hoping you would hurry up. I didn't think I could wait any longer.” Bowser whined.
“I'm here now.” Mario said in a reassuring tone. “Thank you for waiting for me, baby. That’s so good of you.” His hand slowly reached down and squeezed Bowser’s scaly thigh.
This pulled a whine and a moan out of Bowser. “Don't tease me!” He snapped but the anger quickly faded. “Please…I can't take it right now. I need you, Mario. I can't take much more of this.”
“I hear you loud and clear.” Mario said as he stripped out of his shoes and overalls. He took off his shirt which knocked his hat off, but he quickly put it back on. “I know we’ve been doing this a while, but being that I'm not a…how you say, ‘alpha,’ I do wonder if I'm really sufficient enough for this.”
“I've told you before that you are. I don't care if you aren't an actual alpha, I wouldn't want anyone else to help me with my heat cycles, you know that.” Bowser said, lifting his hand to Mario’s face. “Now, if you don't mind, please help.”
“Right!” Mario said with a nod. He moved his hand that was still on Bowser’s thigh up to his second sex that was leaking slick everywhere. As his fingers slowly rubbed against it, the giant Koopa shuddered under his touch. “Just relax for me, okay?”
Bowser nodded, though another soft touch elicited moan out from his mouth as his hands gripped the sheets, his claws nearly tearing them. “M-Mario…!” His deep voice sounded so different when he whimpered.
Mario slowly eased three fingers into the Koopa’s second sex. Being how large Bowser was, this was basically like putting one finger in for a human omega. He could tell it was a decent start from the way the Bowser’s hips rolled at the feeling of being penetrated. “Soaking everything, huh? Makes me wonder what your heat had you thinking about this time before I got here. Wanna tell me, King?” He asked, using the bedroom name Bowser asked to be called. Though he was out off by it at first, he got used to it rather quickly.
“I was thinking about…you ramming into me… shit …while on top of me…and the way… fuck , the way you talk to me, Mario…thinking about it drives me wild…” Bowser replied in between moans.
His obedience earned him another finger from Mario as the mustached hero smirked. “You mean when I call you my filthy King? When I call you my good slut for taking me so nicely and sucking in my cock?” He said, adding another finger as he spoke.
Bowser yelped as he arched his back. His toes curled and his eyes slightly rolled back. “Yes…! Fuck yes…!” He said before biting his lip. “Mario…please.” He begged. “I need you now…so bad…”
Mario wasn't one to tease for too long. Especially not when he was as hard as he was right now. Seeing Bowser like this was pricelessly delicious. He couldn't help but be turned on by it all; the way Bowser looked at him waiting for what was next, the way Bowser moaned his name, so needy and desperate. However, he wanted to try something he never thought about but an intrusive thought won him over. He stuck one last finger in before his whole fist, his hand was inside of Bowser.
“Mmm!” Bowser moaned before looking down at Mario. “What gave you the idea-”
“I acted before I could truly think. It doesn't hurt, does it? Did I move too fast?” Mario said, genuinely worried he may have hurt the giant koopa.
“No…it feels so good…I just never thought you’d do that.” Bowser said as he moved his hips, wanting more.
“Well, all you had to do was ask.” Mario said softly as he moved his arm in and out of the Koopa King.
Bowser couldn't do anything but enjoy the pleasure coursing through him. He had wanted this for a while, but he was sure his idea would be turned down. However, now with him basically riding Mario’s fist, he knew he was very much wrong.
“You want me now, don't you, my King?” Mario said as he slowly pulled his arm out of Bowser’s second sex.
Bowser whimpered at the absence of intrusion, feeling completely empty. He simply nodded amongst his whimpers, along with a desperate and soft, “Please…”
Mario was more than happy to oblige. His member throbbed and leaked in anticipation. Being that Bowser was the only one who could take his enormous package, it was always a relief for him to sheath himself deep into the giant koopa.
As he eased himself in, Bowser’s eyes began to roll back again. Finally, the sweet feeling of him stretching. The smell of sulfur seemed as though it extended far beyond the castle’s walls with how thick the air in the room was because of it. The scent only got stronger as the Koopa King felt Mario beginning to thrust in and out of him. “Mmmm…Mario…Baby…” He moaned out.
Mario was caught up within his own pleasure, but not enough to ignore Bowser. He knew what the koopa wanted to hear. “You're taking me so fucking good, baby. Just like I knew you would. Just like you always do. I love that I fit you so perfectly. You’re such a good koopa, my perfect, slutty King.” He said, getting lost in how amazing Bowser’s second sex made his cock feel.
Bowser was a complete mess. The praising, the slight degradation, the feeling of Mario slamming into him, the sound of skin slapping against scales bouncing off the walls of the room. He could only respond to Mario in moans with the occasional, “Yes” or “More.”
Mario could feel himself getting close. This was the moment he tended to get a bit insecure about whenever he had sex with Bowser. Being that he was not an alpha, he couldn't give Bowser the full experience; he couldn't knot him, he couldn't even scent him.
Though Mario didn't have a distinct scent like most alphas, to Bowser, he could recognize the way Mario smelled. He always smelled just like freshly cut Mushroom Kingdom grass. It was a bit harder to do this with humans, but Bowser had been around Mario and done this with Mario enough times to the point that, to him, Mario did have scent. Therefore, at this moment, Bowser could basically smell the stench of insecurity. He instinctively nuzzled against Mario’s face. “I love doing this with you. I don't want to do this with anyone else but you.”
This made Mario smile as he continued his motions. His thrusts were getting back to their more rough speed. Bowser’s voice turned into whimpers once more as the bed began to shake. It seemed his words rejuvenated something within the hero above him. “I'm so close, Bowser…so close…”
“Please…please cum inside me. I wanna feel how deep you can come inside me, Mario. Give it to me!” Bowser said his arms around the hero, trying his best not to claw his back, knowing that would only end horribly. He felt his own orgasm approaching quickly.
Mario could feel it by the way he was being squeezed. “Only if you cum with me, my King.” He said, gripping the giant koopa’s hips to keep his thrusts least sporadic to make sure he attacked Bowser’s spot every hit.
“Yes…yes, Mario…!” Was all Bowser could say before covering Mario’s entire torso in his cum from his dick, meanwhile his slick from his second sex seemed to drip down both of their legs.
“Fuck, just like that, Bowser!” Mario groaned out as he emptied out every drop of his load deep into the King of Koopa’s second sex. He kept himself situated inside as the afterglow of pleasure began to set in. He may not have been able to knot, but he could at least do this.
Bowser looked down at the worn out man on top of him. He smirked as he took off the red cap. “You know, you don't have to do that.” He said.
“I know, but-” Mario started.
“You don't have to pretend to be an alpha for me.” Bowser said, slamming the hat on Mario’s head. It didn't hurt, but he wanted to get it across to Mario somehow. “I love doing this with you, because it's you . Mario…I've told you many times before, I love you.”
Mario smiled as he pulled out and crawled up the giant koopa’s body to kiss his lips. “I love you too, Bowser. I just…want to give you everything you need and want-”
“And you do.” Bowser said, cupping Mario’s face with one of his large hands. “Again, because it's you , Mushroom hero.” He teased. “Stop beating yourself up about it, okay?”
Mario smiled and nodded. “Okay.” He slowly got up off of Bowser. “I'm going to go get something to clean this up. You just lay here and rest.” He said before placing another kiss on Bowser’s scaly lips.
“I don't even have the energy to argue.” Bowser said as he laid back, his eyes fading as he watched Mario walk out of the bedroom door.