Yeah, they'd let the tension go on forever and ever it seemed. Right after Steve had tried goading him to put the suit on and fight him on the helicarrier that first time, Tony had wanted. Things had only amped up after that, but neither had let themselves have. And Tony had never, ever offered. Not once. Not even when they got together here. He didn't know why, not really. It wasn't as if they hadn't had a little fun in the dark of this room before.
He wanted it though. And so did Steve, if that dark look, practically possessive, had any say in the matter.
Tony squirmed, shifting until he was straddling Steve's lap, bending low enough to get the kisses he wanted, but still have enough space between them for Steve to get his hands where he wanted them to be -- Tony fumbled with his own belt, sliding it out of the loops in order to get it off completely, tossing it to the side of the bed. Nothing in the way now, and frankly just in time because then Steve had his hand around his dick and Tony was letting out a little whine of a noise, thrusting his hips forward to fuck into that warmth. Sweetheart was so pretty on Steve's mouth, and Tony wasn't certain he could come up with any nickname nearly as endearing without sounding ridiculous, so he didn't even try, only jerked his hips back enough to be able to rub up against Steve's groin. "Yours," he said instead, because that reassurance was something that maybe Steve had needed for a long time now.