Eee, so this is definitely not as smutty as you probably hoped it would be, but thank you so much, I had a tonne of fun writing this and imagining different ways it could go 🥰 We so need more pet play in this fandom ❤
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“Sit”. The word was accompanied by a downward hand gesture and Peter, who’d been mid-way through talking about his day, sat immediately, still happily chatting. “Stay” Tony added when he paused for breath, and Peter powered on through his tale as Tony began to move around, working on his latest big project.
“He’s not a dog, Tony” Steve Rogers (and, seriously, how cool was that?!) frowned from the doorway, and Tony scoffed where he leaned over a rotary converter.
“You think I don’t know that? A dog wouldn’t talk half as much” but he winked at Peter as he said it, and the teen flushed and grinned before he switched to telling them about winning top mark in the physics test.
He didn’t really think about it until much later in the evening when Tony scoured his workbench for a tool he needed, spotted it on a rack across the lab and gestured to Peter then the tool, an idle and thoughtless go fetch passing over his tongue.
He was halfway across the lab when he realised the connotation the words had; the tingle they sent down his spine, and he was struggling to analyse it as he took hold of the tool and brought it dutifully to Tony, sitting on the stool besides him and studying him as he worked.
Sit. Stay. Fetch.
He’s not a dog, Tony.
The sudden mental image of being collared and leashed in Tony’s grasp, on his knees and wriggling in delight as Tony murmured good boy in his ear shot through him like a bolt of electricity and he gripped the edge of the table so hard it creaked threateningly, garnering a raised brow from his mentor (and sort-of-secret-boyfriend!!).
He wasn’t sure what to do with the realisation or idea, didn’t know how to deal with the surge of heat that went through him each time Tony uttered the relevant phrases, be it in the lab or the bedroom.
Tony was less forthcoming with the specifics outside of the lab or in the presence of others, but here and there it slipped through like water, cracks he couldn’t plug fast enough. They were at a press gathering for the domineering tech brands of that years when Peter lagged behind in the crowd, distracted by a toddler who’d dressed like Tony, fake beard and all.
Tony was midway through talking when he noticed the lack of chatter at his side and he turned, heart in his mouth for a moment before he caught sight of Peter.
“Hey, shortstack! Come, heel!” He motioned for Peter to join them, a two-fingered beckoning somewhat like one would do to bring a dog to their side. Peter scampered after him without a second thought but Happy frowned as they stepped through the security, looking between them.
“A little less Lassie and a little more official intern, boss” he suggested gruffly as they took their panel passes from the table.
Tony cast him an unreadable glance from behind his shades and continued wordlessly into the panel room, a hand low on Peter’s spine.
“Does it bother you?” Tony rumbled in his ear later, midway through an admittedly intense making out session in the penthouse, Peter perched atop his thighs and shuddering in his grasp when he rasped his stubble along his jaw. Peter paused in where he’d been moaning in his ear.
“When I talk to you like that. When I tell you you’re a good boy or to do something”. Even as he said the words Peter twitched in his grip, and then the kid rearranged himself, slinking down until he was sat on Tony’s thighs before he ground forwards, dragging their hard cocks together.
“That’s something we should explore more of, sweet thing” he purred with a smile, nipping at Peter’s ear and relishing in the soft whine that followed.