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Tony grumbled and pulled Stephen backwards into the bed even as his sorcerer tried to get up.
"Tony, I have to help with the clean up," Stephen protested.
"No," Tony growled, pulling more sharply and causing the man to tumble backwards into his arms with a yelp of surprise. When Tony's hands landed possessively on him as Stephen was pinned to the bed the Sorcerer stopped trying to get up.
"Tony?" Stephen asked cautiously. Tony was holding him tight despite only being dressed in sleep pants compared to Stephen's full pj ensemble.
"You wouldn't wake up and now that you have I have a promise to keep," Tony told him as possessive hands ran over Stephen but kept him pinned. "We're safe, Wanda and her freaky hellhound are toast, the zombie things aren't a problem anymore, and you are mine! I promised you I would show you what it means to be mine and I plan to follow through. You're staying in bed with me today, doc, and you won't be leaving anytime soon."
Stephen gasped as Tony pulled his night shirt off before moving to his sleep pants. When he moved to help the inventor the Cloak of Levitation popped up to capture his wrists and hold him still for Tony. Tony looked up and smirked as he slowly peeled both pants and underwear off of his wizard.
"I promised you that you would be tied to my bed as I wreck you," Tony reminded him with a shark like smile.
"Hello, my Lord Merchant," Stephen murmured, earning an even sharper predatory grin. He gasped as Tony cast a spell that cleaned him out, stretched him, and made him ready to be taken.
"Handy little spell," Tony offered with a smirk, the Merchant of Death glinting in his eyes as they raked possessively over Stephen's revealed form.
"You've had me nightly in our dreams," Stephen murmured, not really protesting the way things were going.
"Not nearly often enough," Tony said gruffly as he settled into place between Stephen's thighs. "I promised you that I would have you. I won't share you either. If you think that those warning about possibly needing to take you on the trip back were any kind of deterrent I'll happily disabuse you of that idea. All it did was make me curse the lack of supplies and privacy to do more than seal the bond."
"I suppose you're going to finally stake your real claim then?" Stephen asked with a smirk. He didn't notice Tony pushing his sleep pants down just enough to release his cock.
"If I am a dragon then you are a key part of my treasure hoard," Tony said as he slid inside his wizard's ready hole.
Stephen gasped as he felt the stretch and slide of being taken while Tony surged up his body to capture his lips in a possessive kiss. By the time they came up for air Tony was fully seated inside Stephen who was trying not to squirm underneath him.
"I should just lay here on top of you for awhile, keeping you pinned on my cock," Tony said smugly. "Maybe it will help you remember that you're all mine and not allowed to get killed, much less by fucking Wanda. Then again a good hard pounding should help with that too."
"And here I thought you were just going to collar me and fuck me silly regularly," Stephen snarked, slightly breathless with how full he was feeling.
"Don't tempt me," Tony said darkly, his hand reaching up to wrap lightly around Stephen's throat in an unmistakable possessive gesture. "You gave yourself to me and it wouldn't upset me one bit to keep you trapped at my side and in my bed. Of course, you knew that was a possibility when you offered yourself as a slave if that's what I wanted."
"I honestly thought that you would just kill me or torture me and then kill me or otherwise take what you wanted and throw me away," Stephen admitted with a wince. "I never imagined.... but just because I didn't consider it likely at the time doesn't mean that I didn't consider it an option that you might take. It was Wong's stepping in that I didn't think to consider and... I grew fond of you even before you invoked the temporary bond that I screwed up. Then there was the whole portal trip."
Tony snorted at the understatement and relaxed enough to start kissing various parts of Stephen's chest and nibbling on his neck. Stephen relaxed as well, familiar with this routine from their joined dreams where Tony would remind him who he belonged to. When Tony moved to nibbling on one of his ears he already knew that Tony was going to follow through on his earlier reminders of past promises yet unfulfilled in the waking world. Even so the next words his lover and master spoke were a surprise.
"You aren't getting out of this bed except for with my explicit permission for the next week," Tony said softly into his ear. "Wong, you, and Tou-san gave you to me even before the bond triggered. Three times over have you become mine without the bond even being in play. Then we put the incomplete bond under stress. If you think I'm not pushing it to fully seal the rest of the way you really don't know me and how much I plan to keep you, Stephanie."
Before Stephen could so much as register his own shock Tony started moving, dragging cries of surprise, sensation, and pleasure from Stephen as he was firmly fucked into the mattress. Quickly overwhelmed all Stephen could do was submit and ride the waves of sensation as Tony claimed him properly for the first time outside of their dreams.
As they both approached orgasm a glow built in both their chests. The arc reactor glowed brighter even as the flesh around it gained its own golden glow. Stephen's chest gained a mirrored spot of glow that pulsed in time with Tony's arc reactor. When they came the glow arched between them and settled a permanent mark in their skins for all to see. A golden glowing network of vines shaped in Celtic knots formed circling the arc reactor. On the other side a mirrored circle of Celtic knot vines plus a line art of Tony's reactor similar to the brand their Shinobi wore in the center of the circle appeared on Stephen's chest. The arc reactor design was inked in glowing neon blue with the Celtic knot vines being inked in black.
Tony chuckled when he saw what had happened after they had recovered from the afterglow and power surge enough to move.
"You can let him go now, Levi," Tony told the sentient cloak. Levi gently released his hold on Stephen's wrists and gently patted his sorcerer's head before flitting off to find Mikael, Friday, and Jarvis. The door sealed behind the exiting artifact as the sanctum gave off a smug air around them.
"You're nowhere near done," Stephen accused sleepily as he felt Tony withdraw and start to clean them both up with a damp towel Levi had left for them.
"No, I'm not, but the bond is finally settling into something less stressful on our bodies," Tony said with a wolfish smirk. "The sanctum locked us in again and everyone outside kept insisting that we rest or at least take some time off. Besides, the Shinobi are actually less freaked out about us staying in here to spend time together than out there trying to help with the rest of the clean up. Last night they practically begged me to keep us home for the day after that vine thing nearly got me and those chunks of skyscraper nearly flattened you. Rhodey cornered me about how tired and strained I was looking and Wong freaked out about you missing something that the other Sorcerers had to catch. He called it an apprentice level mistake and demanded that I make you rest. Our friends caught on that we both needed a break when Shinobi-san approached them about shifts for the next few days and told them about everyone being worried over us. We stick our heads out and try to work and everyone is going to jump on us for half killing ourselves between the battle and the clean up."
"So you figured that now was the right time to complete a major working and magically marry us?" Stephen asked with a snort.
"Hey, it's not my fault that the bond decided to evolve after I finally got you onto my cock," Tony said mock innocently. He disposed of the used damp towel and climbed back into bed, curling around his wizard.
"Are you going to go all caveman and possessive on me before we rejoin the rest of the world?" Stephen asked, amused.
"Probably," Tony conceded. "Wanda nearly took you from me even in death so I'm not likely to actually let you get far away from me for awhile even if you're fine now. I wouldn't have risked it if I didn't think you were close enough to fully healed that you'd be fine with a little sex. The bond wasn't really something I thought about but I'm glad for it upgrading in the process."
They fell back asleep, tangled together in bed. It would be hours before their friends checked on them again with Wong's exasperation the only sign that their new bond marks were noticed and checked.
Thanos would later find out the hard way that the Merchant of Death and his pet Sorcerer Supreme did not take kindly to anyone threatening their home or the universe as a whole.