Luckily, Steve had had the good fortune to be let in on Bruce's current state of very much alive and not in space before he'd received the invitation, but it was still a lot to process. He'd quit the team. Suffered a complete moral crisis, and mourned the loss of his friend, and seriously damaged his relationship with another, and...there was Bruce, working the barbeque like none of it had happened.
He sat on the patio, trying not to let those thoughts cloud his head on such a nice day, sketch book propped open on his knee and sunglasses perched on his head.