Steve was exhausted from everything that had happened lately, the weight of learning about their futures. His best friend was dead and he hadn't been there with her, Tony had a family and then he hadn't made it. It was too much, after everything now this? Steve couldn't imagine how Tony was feeling, he didn't even know how he was feeling about it apart from overwhelmed.
The thing was he knew what it was life, to die for what you knew was right. He wasn't going to stand there and tell Tony he should have done it differently, to be angry about it. The only thing he couldn't understand is how one could exist without the other, it should have been both of them, finally together.
But here? Here they were together and Tony's arms winding around him were all he needed. The kiss tasted like sorry and he didn't want it, didn't need it. Steve's hands dropped to Tony's ass, lifting him up against him, right off his feet. Tony had done what he needed to do and in that moment this was what Steve needed, unable to talk yet, but able to be there.
The shirt her wore hung open and he roughly pushed up Tony's shirt as well, to feel the heat of his skin against his own, that point of contact.