Remus had never felt more useless in his life than he did while watching his son being born. Whenever someone gave him some small task to do - fetching water or the like - he was grateful, since it was, at least, marginally useful. Mostly though, it was Tonks and his job was to hang on to her hand and stay out of the way of Hestia and Andromeda.
He did not, to his credit, faint. There was a certain amount of clammy-skinned paleness, and being infinitely glad he hadn't been born a female, though. Followed by guilt over that relief.
Finally though, after what felt like years it was over, and Tonks was holding a tiny, yellow-wrapped, wrinkled red infant. Remus smiled, reached to brush tentative fingers over the soft, downy head. "Merlin, for his sake I hope not," he answered with a quiet laugh. He brushed sweaty hair back from Tonks' brow then. "He looks more like you."