"Padfoot!" Remus protested, even as he let himself be dragged to Teddy's side. He knew his friend was trying to help. Sirius generally meant well and just wanted to see the people he'd claimed as fammily -- and judging by the physical interaction between the two, Sirius had clearly claimed Teddy already -- happy. But, this wasn't helping.
"Sirius." He said firmly, ignoring the look he knew was supposed to goad him into some kind of action. "Stop."
Turning to Teddy, he sighed softly and took a moment to put words together in a way that would make sense instead of his earlier rambling. "I think what my dear idiot here," he started, his tone laced with an exasperated fondness that hadn't been there in years, "is trying to do is turn this into a cuddle pile of some sort, which is fine if it's something you're okay with. However," and here he shot a significant look at Sirius before returning his gaze to Teddy, "I'm at a point in my life where physical affection has to come with consent. Yours, not mine, I mean. I'm not sure how this works, you see? Meeting a son who won't be born for another fifteen years into my future. Is it okay to hug you? Is it weird? I'm okay with hugging if you are. I'm also very okay with not hugging if it's too soon for you. I can't imagine this is any easier for you than it is for me. And you don't have to feel obligated to indulge in displays of affection just because Sirius thinks we should."
While Sirius might think hugging was required, Remus was under no illusions that someone, let alone the son his future self had and then abandoned for battle, would want that sort of affection from Remus. For all Remus knew, Teddy was glad he'd dodged a crucio in not having to grow up with a werewolf for a father.