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Prove it.

Summary:

Tony is asked to prove that he wont get hurt if he gets his own way.

TLDR: Tony proves he is a Size queen

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They took each other to the local bakery every Thursday and today was no different. Everyone knew about them now, after years of hiding their ‘workplace’ relationship they had finally come clean to the team once they faced off Ultron and they were all, almost, blown up on Sokovia. Half of the team already knew about them, they weren’t the most covert, leaving the R&D levels of the old tower with disheveled hair, red faces and a somewhat dazed look in their eyes. They would also claim to hold ‘personal lectures’ for each other that they said the others wouldn’t understand. It was almost too obvious to most. The only two that were surprised were Rhodes and Rogers, they both had their minds set on more important work than who was screwing who in the room next door.
This bakery trip ritual became some well needed time away for the two, they would take it in turns to pay, to order for each other and to drive back to the compound. Today, Tony was the wallet, Bruce the orderer.

“Can I please get an extra large flat white, a mint tea, three scones, a double slice of chocolate cake, a cheese danish and one of your caramel slices? Oh and that slice to be in a take out box. Thank you.” Bruce smiled, his appetite was more than reasonable for his size now, and the bakery was so used to it, it wasn’t an issue. They even started making extra batches of things on Thursday mornings to make sure they had enough stock for their best customers.

“Of course! That will be-” The cashier was interrupted by their manager pulling them away for some reason. Another worker started to plate up Bruce’s order and he simply placed down the $50 Tony had given him, smiled and said where they were sitting, claiming the rest of the cash to be tip.

Bruce sat in the booth in front of Tony and took off his oversized blazer, folding the rough tweed into a neat pile next to him. “So. Tony, you are already sulking. Didn’t want your regular cheese danish this time?” He smiled down at Tony and gestured to him with exposed palms.

“No, I really do want my danish… But I need to talk to you about something. Nothing bad, I just didn’t want to talk about it in the vicinity of the guys y’know?” Tony placed his hands on his cheeks and smiled under his palms. “I mean not that this is the most appropriate place but I thought I would wait until I had treated you to something sweet.” Two fingers on his left hand went to tap his wallet. “I just wanted to - Hey!” Tony stopped as a waiter brought over the plates of food and placed them down, the plates clunked onto the table and Bruce’s eyes widened at the delights.

“And here are some napkins and cutlery, enjoy!” The waiter waved and walked back around to the counter.

“Tony just tell me already, it's been years now and you still can’t spit it out with me.” Banner took a gentle forkful of the sticky chocolate cake and placed it in his mouth. “What did you want to say?” His smile was so gentle even if he was half hulk now. He was more at peace now than he ever was. Tony loved seeing him like this, every Thursday, surrounded by delicious treats, and sitting directly opposite him.

Tony took a deep breath, rolled his shoulders and placed his palms down flat on the table, a little nervous. “Ok, fine.” He propped his elbows up on the table like he was making a business deal, pointed both hands at his green counterpart and spoke.
“Why won’t you screw me?”
Bruce instantly sat up straight and cleared his throat, his eyes darting to the tables around him. You could see a tint flushing over his cheeks.
“Well, you said get to the point.” Tony clarified.

“Yeah but I wasn’t expecting you to say that!” Bruce dramatically rubbed his face with one hand. “And you know the answer to that. We have talked about this.”

“Well you said no without an explanation, so no not really… Just tell me why and maybe I’ll drop it.” Tony sat back in a bit of a sulk.

“I’ll try and put this in a public friendly way. I’m Seven foot two now. You know my… dimensions…” He closed his eyes and rubbed at his temples with his forefingers. “I don’t want to hurt you, even if you think you can take it.” His serious tone flattened the atmosphere.

“Come on, Green Bean! There's only so much I can do with my hands and I’m getting fed up with you refusing to bottom too! You can’t have it all and then deny me those ‘dimensions’ you’re packin’.”

“I’m not having it all! Tony, you know I miss it too but, I think what we have now is safe, fun and appropriate.” Another fork of cake was stuffed into Bruce’s mouth, his patience wearing a little thin. “I’m sure we can try something else if you need something more… exciting?”
Tony scrunched up his face, took a dramatic bite of his pastry and followed it with a swig of coffee.
“Don’t look at me like that. I refuse to take you to hospital in the middle of the night and get asked why my regular sized man-child is suffering from internal trauma.” He raised a napkin to his mouth, keeping his eyes glued to his food.

Tony dragged two of the plates to his side of the table, making a barrier between them and Bruce with his arms. “No more cake for you.”

“Tony, you don’t even like chocolate cake, and I’d love to see you try to eat all three of those scones. Give them back.” Bruce laughed a little, pointing over to Tony with his fork.

“Why don’t you trust that I know what I want? Let me make mistakes!” Tony whined.

“Because you don’t really have a great track record with mistakes.”

“Just let me Banner! You’re so nasty!” Tony shoves the plates back over to the other side and grumpily sipped at his drink once again.

“Fine. Tony. You prove to me that there is no way in the known universes that I would ruin you from the inside out if I gave you the chance, then I’m all yours.” Bruce gave a smug smile thinking that he had won and Tony was never going to be able to manage anything past his fingers anyway.

Tony brightened up, a cocky grin plastered to his face. He rubbed his goatee on the back of his hand and simply replied, “Deal.”
Bruce didn’t like his change in attitude but stayed confident that he wouldn't be able to prove a thing.

 

_- + -_

 

Thunk.
Tony dropped a hefty box onto Bruce’s desk, folding his arms over his chest.
“Well?”

“Well what?” Bruce questioned, there was nothing exciting about it, just a brown cardboard box with a flip top lid. “Is this for me?”

“No, yes? Just take a look.” Tony wore a smug expression, just waiting for Bruce to open it up.

Bruce shook his head, took off his glasses and set them down on the glass table.
The lid was lifted and slammed back down with force, big palms flattening it a little. He said nothing and looked up at Tony with a confused and nervous look on his face.

“Proof.” Tony gave a matter of fact look down at Banner and shrugged. “Thursday you asked for proof. I have been using those every evening and can still go on my regular run every morning. I’m not dead. I’m not paralyzed.”
Bruce’s eyes snapped to the box and back up at Tony. He was in awe at the dedication.

“You- You’re serious. I mean I wasn’t expecting you to go to these lengths… and widths…”

Tony slammed his hands onto the desk, “Don’t underestimate me. I am a dedicated, persistent bastard.”

Bruce was speechless. His mouth slightly open, taking a moment to peek into the box once more.

“Come on Banner… I don't want to have to ask you another hundred times… Silicone ain’t cheap and I don’t like wasting my money for nothing.” He traced a finger along the edge of the box and gripped the sides. “Well, I’m taking these back up to my place. Your move Big Green.” Tony turns and walks out of the room, waving over his shoulder.

Bruce sat silently, shocked and impressed with the information he had just absorbed. His brain fizzed over slightly and he shook himself back into the moment. He shoved his laptop into his bag, grabbed his jacket and dashed after Tony, feet scooting along the floor.
“Hey - Hey wait!”

 

_- + -_

 

Clattering of nick-nacks melded with soft panting as Bruce shoved Tony up against his bedroom bookcase. The folders, statuettes and paperbacks tumbled with thuds and clunks.
“You’re ridiculous, you know that Stark?” Bruce asked, dotting kiss after kiss along Tony’s shoulder. He could smell his cologne, a spicy but smooth concoction, so strong he could almost taste it. “You want this so bad and you just have to have it don't you?” Bruce mouthed at the tendon on his neck as Tony leaned away, opening up to invite more contact.

“But you love giving me what I want.” Tony huffed, uneven breaths over giant shoulders, fingers gripping the best he could to the cotton shirt, but it was so tight over the muscles it was worthless. “Bru-Bruce, just take this off already…” He tapped at Bruce’s arm.
He did what he was told, moving back slightly, undoing his top few buttons and gracefully pulled the shirt over his head. There was nothing that Tony got off to more than the sight of this half man half beast, twitching with anticipation.
The green skin complimenting the dark hairs on his chest, the inhuman width of his biceps. Something that was so unique. This beast was his alone to consume with eyes and body.

Bruce picked Tony up with ease and walked him over to the middle of the room, flopping him down on the mattress, Tony’s body bouncing a little from the height he was dropped from. Banner leant over, hands either side of Tony’s shoulders.
“You sure you want this? Because Honestly, now you have shown me how much you can take, it’s hard to imagine you not following through. I know it’s mostly me here but I can’t say there's not still a little of the other guy waiting in the wings to take a little control.”
Tony was listening intently, nodding along to every word. He placed his hands on the immense pecs above him, feeling Bruce’s pulse beat hard through him.

“You change your mind now, Banner, and I am never going to forgive you.” He was the most sure he had ever been. His heart was racing, fully embracing the heat of Bruce’s form looming over him. “Don’t make me beg.” He leant up and kissed his partner hard, drawing him down to lean on his forearms. The familiar feeling of tension in his jeans was complemented by the throbbing mass leaning down on him. “You seem to be pretty down for this, Banner, how about we get s-” He was interrupted by a hard kiss and a shifting of hands, large fingers pulling at his bottoms and exposing him swiftly. Tony could hear his heartbeat bumping in his ears, this was finally going to happen. Six months of nothing but basic foreplay and mutual mastubation finally culminating in him getting exactly what he wanted.

Bruce knelt one knee up on the edge of the bed and tossed Tony’s pants to the floor, he tugged at his shirt and pulled it up and over his head, making Tony’s hair scruffy. It joined the jeans on the carpet.
“You already look pretty ragged Tony. You sure you want this?” He pawed at his erection, straining at his pants.

Tony knelt up, pushed his hand through his hair and grinned up at Bruce. He placed his hands to the buckles of Banner’s belt and simply said, “Positive.”
He undid the buckle, kissed once between Bruce’s pecs and shimmied the pants down, letting the colossal appendage slowly point toward him. Around the size of his own bicep, Tony could just about hold it in two hands, almost touching middle fingertip to thumb on either hand, not something he could ever get his mouth around, but that wasn't what he wanted to do with it.
He took it in both hands, looked up at Bruce and squeezed. He couldn’t beleive how close he was to finally getting his boyfriend to fuck him again, his face was flushed pink and his mind was growing hazier as the moment set in. Bruce smiled down at Tony and pushed him back with the tips of his fingers, he kicked off his pants from his ankles and crawled up onto the bed with a creak. The bedding shifted slightly, the sound of fabric on fabric was the only thing that you could hear other than the heavy breathing of the two men.

Banner took his left hand and placed it over Tony’s erection, the space between his thumb and first finger cupping it perfectly. He applied a little pressure and waited for Tony to react. A sharp inhale, a desperate whimper. Another press to his cock and he verbally whined. “You want this so bad. You’re hungry for it.” Bruce flashed a wide grin and planted a deep kiss to his partner’s mouth.
“Just say when.” He reached down below Tony's dick and pressed at his hole, not expecting to find a wide silicone bar. He tapped it twice and whispered into the crook of Tony’s neck, “You don’t mind do you?” Bruce tugged at the bar and a little resistance tugged back, a soft squishing noise followed as the plug was removed.

“F-Fuck… Fuck me Banner.” Tony snapped, his ass twitching without the stimuli.

Bruce leant up and over Tony, grabbing a hefty tube of lubricant, cracking the lid and squirting a generous helping over himself. “I can’t wait to feel you again, Stark.” Another breathy whisper left in the mist of heavy breathing.
Tony’s eyes fell to the back of his head as he covered his face with his hands. His heart beating harder and harder.
Bruce took a knee in either hand and freely pressed his girthy member to Tony, the cool lube such a contrast to the heat coming from both him and his partner. His tip pressed in firmly and the sheer pressure felt was enough to make Bruce lose a little control. It had been so long. Tony was shaking with excitement, breathing faster and faster.

“Please… Fucking please, Bruce, give it to me.” Tony’s tone was one of pure joy and excitement. He wasn’t ready to wait anymore, just begging with his body and eyes. Glossy, sweat covered, twitching from every inch of his body.

Bruce firmly pressed himself into Tony and earned a glorious humming from him, every inch slowly grinding into him. Bruce slowly leant back down on his forearms and held the sides of Tony’s head, letting him wrap his arms around the back of his neck.
“I’m going to fuck you so hard…” Bruce looked Tony dead in the eyes and shoved his last remaining inches into him.

“Fuck!” Tony yelped, gripping hard at Bruce’s hair. Bruce started to pound into his playmate with increasing speed, surprised he was able to fully bottom out without Tony even tapping a shoulder or prompting him to wait. No, Tony was in a state of pure bliss, eyes fully rolled back, flushed complexion and gasping incoherent curse words.
He felt so good, he was so tight, squeezing back on Bruce’s cock at the hard pounding becoming faster. Each time he pounded into him a sharp breath was huffed out of Tony, still he was babbling nonsense and fucking back as best he could.
Bruce’s hips darting in and out turned to hard grinds and rolling motions, nothing had felt this good for so long, it was such an animalistic need to pound into this guy harder than he ever did when he was mostly human.
The slapping became more and more paced as Bruce’s mind fell into a woozy primal state, thinking more with his throbbing inches than his perfect mind.

“Move.” Bruce growled, pressing hard into Tony and slowly pulling back. Tony ran his fingers through his hair, trying to regain some composure. That tone, not quite the concerned Bruce there usually was, something exciting. He fumbled backward a little and watched as Bruce crawled up to the head end of the bed and sat between the pillows.
“Sit.”
Obedient, still in a horny haze, Tony obeyed straddling thick thighs. He propped himself up on the tip of Bruce’s cock and wiggled on, hands flat to Bruce’s chest, humming again as he was refilled. The calm was cut short as Bruce took Tony’s waist in hand and shoved him down hard, creating a sharp slapping sound and another grunt from Bruce.

“Oh fuck! Fuck, Shit Bruce!” Tony could barely string a sentence together as he was bounced on the thickest thing he had ever seen, his own dick springing up and down with the momentum, tracing a thin string of pre-come from him to the monster below.
“I’m gonna fu-hu-fucking come!” His breath was hitching with every pound and he could feel his stomach aching, bulging a little through his toned belly. He was losing it.
He took it upon himself to speed things up, using his thighs to bounce himself more and more, in tandem with Bruce. Slap after glorious slap Tony could feel himself flowing over, so close, getting stretched out, feeling so filled.
He leant back, placed a hand on a big green thigh and took his own cock in hand, jacking it with rigor. His panting was laced with a whiny undertone, peaking as he swore hard, cursing out as he came, shooting a thick rope of cum across Bruce's chest.
The pace still held, Bruce had not let go and was still using Tony like a sex toy, fucking into him like a fleshlight.

“Bruce! - Fuck -are y-you good?” A smug smile peeked through his post orgasm haze, still being impaled over and over.

A simple gravelly note arose from Bruce as he knelt up, flattened Tony to the bed with a loud creaking of the frame, and placed his large hand over Tony’s chest. He fucked into him hard, rucking up the fabric of the bed sheet. His face was scrunched up like it was some sort of primal urge to fill Tony with everything he had.
The loud smacking noises of balls on ass were overridden by a building rumble deep in Bruce’s chest.

“Oh m-my god… Bruce… Fuck…” Tony’s head was spinning, another mini orgasm whirring through his body.

Bruce gripped hard on Tony’s chest and sped up slightly once again. Tony wheezed a little and his eyes rolled back again, stomach contracting. The pace of Bruce's hips became erratic and he grunted and took one last thrust, deep. Just a loud hum-like growl and Bruce was filling Tony up with an unreal amount of cum, pressurised behind the lack of space in Tony, it oozed past the plug of his cock and he pulled back, letting the remaining liquid flow from Tony’s hole.

A moment of silence echoed over the steamy heat of the room. Soft but deep breaths of both men floated between them.
“Jesus… Tony… So I think I got a little carried away there. You feel so, so good.” Bruce noted arms shaking, trying to keep himself from falling flat. “T-Tony, you ok?” He places his hand back to Tony’s chest and wiggle him, to prompt a response.

Tony grabbed at Bruce’s forearm and squeezed it weakly, “Can you pass me that water bottle on the side? I don’t think I can sit up.” A sarcastic but half true line uttered from the smaller man. He tried to lean up on his elbows and blinked unevenly.
He took the bottle from his partner and took three large gulps like he had been without water for days. He gasped as he pulled it away from his lips and wiped his mouth.
“So, now you know you can trust me with your ‘dimensions’, you better do this more often.”

Bruce shook his head and sat back, “You are unreal. You sure you’re ok though?”

“I’m fine.” He flopped back down to the bed and took a well needed deep breath.

“Good because we are doing this again. It’s only 2pm. How long do you need?” A dark smirk crawled along Bruce’s face.

“What? Are you kidding me! I’m spent!”

“I’m kidding, I’m kidding… Maybe half kidding” Bruce joked tossing a pillow, knocking Tony back down again. “Just make sure you are ready for this again though because that was delightful.” Bruce took the bottle from the bed and squirted a long stream into his mouth.

“Ahh give me twenty minutes” A muffled joke back through the fabric of the pillow. “Ok twenty five minutes…”