When Tony wakes up he makes his way automatically to the nearest coffee machine. He doesn't really notice that he's in his workshop until he's most of his way through a third mug of coffee. He looks around blearily.

'What? No. I was definitely with Steve.'

'Good afternoon, sir,' Jarvis greets him. 'To when are you referring? You passed out on your desk a little over seven hours ago and Captain Rogers was not here.'

'What is it doing?' Tony glares at the generator.

'The readings are unusual,' Jarvis is clearly confused. 'But there is nothing harmful.'

Dummy nudges a plate of toast into his hands. One of the pieces has clearly been run over.

Tony takes one step backwards and then sits down heavily onto the workshop floor. Dummy beeps and whirs at him in concern and he feels the other two bots turn their attention to him in his mind.

'Sir?' Jarvis calls. 'Sir?'

'I... No. Come on. No,' Tony realises he's babbling denials. 'It's not...'

'Sir, I am calling Captain Rogers,' Jarvis' voice reaches him through extremis.

'Ok,' Tony nods vaguely. 'Steve...'

'Tony, I need you to take some deep breaths for me, ok?' Tony realises there's something warm cradling his head. 'Tony? Can you hear me?'

'Steve,' he latches himself blindly to the warm thing and it hugs him back.

'Tony?'

Warm solid muscle; Steve.

'What day is it?' he pulls back suddenly, gasping, to look Steve in the face.

The soldier rallies quickly to this change,

'It's Thursday; you've been down here three days,' Steve doesn't let go of him. 'Tony, what's wrong?'

Tony just shakes his head and glances around as he pants. Steve appears to be kneeling on the floor and he's managed to get himself into the soldier's lap.

It's not a bad place to be.

He crashes his lips to Steve's and wraps his arms tight around his neck. Steve responds to the kiss beautifully but he feels his hands flail for a moment before settling on his back.

His feels himself slump to the side as oxygen deprivation finally catches up with him. He doesn't fall far; Steve supports him even as he makes a wounded noise in his throat.

'Tony? Oh my...' he can feel a gentle stroking to his cheek. 'Tony?'

Tony just curls himself against Steve's chest and clings.

'Jarvis, what happened?' Steve holds him protectively close.

'I am not certain, Captain. Sir seems to have experienced a panic attack, but I am uncertain as to the cause.'

'I'm going mad,' Tony finally admits.

There's a pause and Tony's inexplicably grateful that they don't immediately dismiss him.

'Sir, what has led you to this conclusion?'

'It's... like déjà vu,' Tony speaks against Steve's chest. 'Like I've lived this before. I have... I remember living this day twice before.'

'Is it extremis?' Steve is carding his fingers through Tony's hair. 'I mean, computers think really quickly? Are you having really realistic dreams?'

Tony just shakes his head,

'No. It's not like being in the network. It's like it was real. I believe it was real.'

'Well, it can't have been,' Steve tells him.

Tony finds himself giggling and tries to take a gulp of breath to calm himself.

'Perhaps it was,' Jarvis announces.

'What?' Steve, the saint he is, keeps petting his hair.

'The generator sir made was for Doctor Richards and he has been known to experiment with alternate realities,' Jarvis points out calmly. 'Perhaps you have received information from these realities through extremis from the device.'

'Shouldn't work that way,' Tony disagrees.

'Well,' Tony can feel Steve straightening his shoulders as his chest moves against Tony's cheek, 'then either you are a little more crazy than we already knew, or you are reliving the day.'

'Time travel?' Tony lifts his head and receives a kiss to his temple for his trouble.

'Is it... possible?' Steve gazes at him.

'Wait,' Tony pulls back a little further, 'did you say 'more crazy than we already knew'? That's... that's... Cap, you're supposed to be on my side!'

Steve just grins at him.

Tony scrubs a hand across his face and levers himself up and off of Steve's lap by the blonde's shoulder. Steve's gaze follows him as he paces to where Dummy abandoned his toast and back towards Steve.

'All right,' Tony rubs his hands together. 'Let's assume I'm not completely crazy; what does that gain us?'

'If it is technology that caused this,' Jarvis says, 'then it is something we can counteract.'

'Vote of confidence,' Tony nods, 'good.'

Steve stands up and glances around,

'You think something down here did this?'

'It would be a pretty massive coincidence otherwise,' Tony doesn't sound convinced but gestures towards the generator. 'I finished making that this morning. Or two days ago. Whatever.'

'Turn it off,' Steve instructs with a scowl.

'Never would have thought of that,' Tony sighs and Steve glares at him.

'Well, what then?' Steve crosses his arms across his chest.

'I don't know,' Tony hesitates before stepping closer to Steve. 'I spent all of my yesterday afternoon thinking about this, assuming that actually happened, and I don't know what to think anymore.'

He takes another step towards Steve and then another before Steve finally relents and closes the distance to pull him into a hug.

'Take a break,' Steve tells him. 'Come downstairs for an hour or so and try not to think about it.'

Tony sighs in frustration,

'I shouldn't,' he mutters but tucks his head under Steve's chin.

'Just an hour,' Steve presses a kiss to his hair. 'You just had a panic attack; just relax for a bit, ok?'

'Relax,' Tony nods vaguely, his mind still spinning, 'sure.'

Steve makes him breakfast, even though it's well into the afternoon, and sits with him as he eats it.

'Rogers, you're making me self-conscious,' Tony pushes his half-eaten food away. 'Which is a very strange feeling for me.'

'Don't call me that,' Steve sounds hurt.

Tony ignores him and drags his fingers though his hair,

'Maybe if I shield the reactor enough then I'll neutralise its affects.'

'You're meant to be relaxing,' Steve sighs.

'Excuse me for not wanting to be stuck in a time loop,' Tony snaps.

There's silence for a few minutes and Tony eventually glances over to see Steve glaring at his coffee.

Tony really needs not to break whatever it is he has with Steve; restarting time, if that is what's happening, won't be as worth it if he does.

He walks over to his partner, gets between him and the kitchen table, and straddles his lap. He's kissing Steve before the bigger man can object.

Tony wraps one arm around Steve's shoulders as his other hand tangles into the soldier's hair. Steve kisses back enthusiastically and puts both his hands to Tony's lower back; he tugs him further up his lap.

By hooking one leg around the chair Tony finds enough leverage to grind down and is rewarded by Steve groaning and bucking up against him.

'Are you always this horny or is it just today?' Tony asks.

Steve gives him a very bewildered look and seems to be trying to think of an appropriate response before Tony cuts him off by sucking hard on his jaw.

'We're in the kitchen,' Steve finally whimpers.

'And that gets you hard?' Tony grins. 'Must be awkward.'

'The kitchen doesn't make me..' Steve looks like he's trying to fight his blush. 'I meant this isn't an appropriate place to.. do this.'

Tony hums a vague agreement but grinds down again, making Steve tip his head back as he stifles a cry.

'If I agree to let you up,' Tony speaks between nips to Steve's throat, 'and we take this to the penthouse, will you stop stopping yourself making a sound?'

'Yes,' Steve agrees readily, 'yes, ok, let's go.'

Tony doesn't get up,

'Can I think about it for a minute before I decide?'

Steve seems to have been reduced to vague nodding as Tony presses a hand to his groin and rubs him through the cloth there.

'You're borderline submissive, aren't you pet?'

'Please, Tony?' Steve finds his words.

'Of course, sweetheart,' Tony makes sure to keep physical contact with Steve as he guides him up from the chair and into the lift. 'Penthouse, Jay,' he starts undoing the fastenings on Steve's pants.

Steve has his hands fisted in the material of Tony's t-shirt and he kisses enthusiastically as Tony tows him out of the lift and walks backwards into the lower penthouse. Tony turns the soldier as he reaches the sofa, he tugs down Steve's clothing and then pushes him down into the seat.

'Here we are,' he says and wraps his hand around Steve as he climbs back onto his lap.

Steve groans obediently and his hips rock upwards,

'Your clothes,' he uses his grip on Tony's t-shirt to pull it off.

Tony grins and gets up long enough to strip completely; he pulls off the last of Steve's clothes as well before resuming.

'I can't tell if you haven't quite noticed that we aren't in bed or if that is actually turning you on.'

Steve doesn't reply beyond tugging Tony closer.

'You're devastatingly gorgeous like this,' Tony tells him. 'Maybe it's another superpower.'

Steve's head drops to rest on Tony's shoulder as he groans,

'Please...' he whispers.

'We're getting there,' Tony pets him even as he starts thrusting in earnest against his abs.

'Tony tonytonytony...' Steve gasps and throws his head back again.

A slightly harder bite is all it takes to throw the blonde over the edge with a wail. Tony follows him a moment later and slumps, panting, into Steve's arms.

Steve hugs him close and presses his face into Tony's neck as they both calm down.

'Well, your plan worked,' Tony tells him as he allows the cuddle.

'I'm the man with a plan,' Steve agrees absently. 'What plan?' he asks a moment later.

'To make me relax,' Tony grins against his shoulder. 'Don't act all innocent now.'

He feels Steve huff a brief laugh and figures that, for now, he's managed to retrieve the situation.

Attentive is probably the best way to describe Steve after they've showered.

Tony realises he's actually thinking of the man as 'Cap' due to his focus.

'I am ok,' Tony tells him, again, without looking up from his reading.

'Yeah, you look really happy,' Steve manages not to actually scoff audibly but it's implied.

'I'm reading Reed's most recent thesis,' Tony rolls his shoulders. 'I need to get up to speed on this shit.'

'Couldn't you call Doctor Richards?' Steve suggests.

'He didn't answer,' Tony shrugs. 'I left a message.'

'Were you polite?'

'If I was polite Reed would never believe it was me.'

Steve does at least laugh a little at that.

'Urgh,' Tony groans. 'He keeps assuming knowledge of other publications,' he opens the referenced article on another of his screens, 'I pity whoever it was that had to read through this to award his latest doctorate.'

'Do you need anything?' Steve asks quietly.

'Coffee,' Tony tells him promptly. 'And I'd like it if you kept me company?'

'Yeah?' Steve grins. 'Ok.'

It takes Tony hours to make his way through Richards' paper and is left knowing he's going to have to read it again to make sure he actually understood it. He groans aloud and stretches as he looks around the room.

Steve is sitting quietly over in the beaten up sofa in the corner; Dummy is hover nearby peeking over his shoulder at whatever he's sketching. You is in his charging station and Butterfingers appears to be reordering his wrench collection.

'In order of cleanliness, sir,' Jarvis supplies.

'Very useful,' Tony rolls his eyes.

Butterfingers just chirps and continues to shift the tools around. Tony shakes his head and looks over to his boyfriend.

'Hey,' Steve smiles, 'an expert yet?'

'Not quite,' Tony shrugs his shoulders. 'I'm ordering food in. What do you want?'

'Where are you ordering from?' Steve closes his sketchbook.

'That place three blocks over that does that paella,' Tony tells him.

'I don't think they deliver,' Tony sees the exact moment Steve remembers who he's talking to. 'I'll have some more of the same then, please.'

'Sure thing,' Tony nods and waves vaguely to tell Jarvis to sort that out. 'We have a bit of time before it arrives,' he leers.

Steve blushes beautifully and licks his lips,

'Umm..'

'God, you really are horny all the time!' Tony exclaims with a grin and walks over.

'I'm a ninety year old virgin,' Steve speaks through his violent blush. 'And you're... everything I could want.'

Tony knows his smile just softened into something disgustingly heartwarming.

'It's all about the sex with you kids,' he puts a hand under Steve's jaw to tip his head back for a kiss.

'Yeah, I'm really taking advantage of you,' Steve smiles.

'Also, you're not actually a virgin anymore,' Tony tells him.

'Not quite,' Steve presses a kiss to his wrist, 'I still want to… go all the way with you, though..'

Tony tugs Steve into a quick hug so he can't see the expression Tony's now making; it was two days ago that he first went that little bit further with Steve, which means for this Steve it's never happened.

'You want that?' he speaks into Steve's hair.

'Yes,' Steve hooks a finger into one of his belt loops and pulls until his face is pressed beside Tony's groin. 'I want...' he places a gentle kiss to Tony's fly.

Tony forces his hips not to thrust forwards,

'Anything you want, sweetheart.'

Steve's fingers are fumbling for his zipper before he knows it. He braces himself with a hand on Steve's shoulder and runs the other gently through his hair,

'You don't have to,' he chokes as fingers brush against him as his pants are tugged down. 'If you don't like it stop there's plenty else we can...' he swallows heavily as Steve presses a kiss on him through his boxers.

'Try anything once, right?' Steve replies and kisses him again as he pulls down his boxers.

Ok. Captain America is holding his hips and breathing over him while perched on the edge of the sofa in his workshop.

Tony, whatever you do, do not thrust.

His grip on Steve's shoulder would probably be bothering anyone else; he can see his knuckles are white where his fingers are pressing hard into flesh.

'Tell me what to do?' Steve asks quietly, looking up with seemingly giant eyes.

'Anything, darling,' Tony finds his voice. 'Anything you're comfortable with. Just careful with your teeth.'

'Tell me what to do,' Steve pulls back a little and gazes up at him. 'I'm... what you did to me before.. teach me to do that.'

Tony groans,

'Ok! Ok…'

He guides himself into Steve's mouth as he makes requests for what Steve does with his tongue.

The part of Tony's brain that never stops thinking is telling him that Steve takes orders beautifully.

Tony pets his fingers through Steve's hair and refuses to let himself take any grip on him other than to brace himself on his shoulder. When he hears himself whine he gives Steve a little nudge,

'I'm close, Steve…' Steve doesn't move at all. 'Steve, I'm…'

One look up at him from Steve and his world whites out for a moment. Tony groans and loosens his grip on Steve's shoulder; shifting his fingers a little where they've become stiff.

As he catches his breath he gazes at the soldier and sees him shudder before slumping forwards to pant against Tony's thigh.

Tony gives Steve a little push to make him sit back on the sofa and then kicks his pants and boxers off from around his ankles to curl into Steve's arms. He pulls Steve into a filthy kiss and around his mouth where he's still panting too hard to reciprocate..

'You are too wonderful,' he tells him and reaches for his pants.

Steve intercepts his wrist and shakes his head.

'Come on,' Tony scowls, 'I want to.'

'I already did,' Steve blushes. Tony looks to see that, yes, Steve apparently is the hottest thing in the entire galaxy.

'When?' Tony asks, because of course he's curious.

'Just after you,' Steve glances away, still blushing, 'sorry.'

'Sorry?' Tony splutters. 'You came in your pants, untouched, from giving me head; Rogers, that's unreasonably hot.' He pulls Steve back into a kiss, 'very, very hot, Steve.'

'Don't call me Rogers,' Steve tells him, but he's grinning now.

Tony curls against his chest with a hum as Steve's hands settle on his bare hips and then rub up under his t-shirt before hugging him close.

'It was... I was ok then?' Steve asks quietly a few minutes later.

'I believe I used the word 'wonderful' actually,' Tony tells him as he stirs from his half doze. He sucks on Steve's collarbone (because how could he not when it's right there?); Steve doesn't seem to mind.

'I need to shower,' Steve shifts uncomfortably under him.

'Sir, your food delivery has arrived in the foyer,' Jarvis announces.

Tony sits up with a smirk,

'Would you go and get that for me, darling?' he pats Steve's shoulder. 'I'm not exactly dressed.'

Steve blushes and glances down to where Tony is very obviously half naked and to where his own pants have a rather unfortunate damp patch,

'I'm not going down there like this.'

Tony laughs,

'Go to the penthouse,' he gets up and grabs his own pants, 'I'll be up with food in a moment.'

Steve looks vaguely relieved, as if he expected Tony to actually insist he be the one to go.

'You're precious,' Tony tells him and walks out of the workshop as he's doing up his fly.

After Tony has eaten his fill, and Steve has eaten everything else, they move upstairs. Tony sits against the headboard and gets his reading back out even as he watches Steve getting ready for bed. Steve settles down beside him; his fingers just brushing Tony's leg.

'You're not going to figure this out tonight, are you?' Steve gazes up at him.

'I doubt it,' Tony pets his hair.

Steve nods, strangely accepting,

'There's always tomorrow.'

'I guess,' Tony scowls at his tablet.

'I'll always be here, if you need to relax,' Steve smiles at him.

'Not actually you though,' Tony tells him. 'You won't remember.'

'I'll still love you,' Steve tells him firmly.

'Go to sleep,' Tony smiles a little.

'Good night,' Steve curls against him.

'Good night,' Tony tells him quietly. 'I love you.'

It's around six hours later when Tony's research is interrupted by Dummy calling to him over the network.

'Dummy?' Tony focuses on the readings the bot is showing him. 'That's... What is it doing?'

Everything goes dark.