Sirius sat for a second, utterly stunned. Then his face lit up like a Christmas display and he let out a primal whoop if joy. He all hut launched himself at James, wrapping his arms and legs around his friend like an excitable octopus, and loudly kissed the top of his head.
"Jim, James, Jimmy, Prongs, that's fucking BRILLIANT!" Sirius hadn't lived through learning about Harry, but he could only imagine how excited and terrified they all would have been. Lily being pregnant during a war, a baby when everything was falling apart... But this was different. This was a second chance, and a safer world, even if everything was still batshit. Sirius Had learned long ago that things were always batshit. There was always a war, or a threat, or a fight. There was no such thing as perfect or safe. This was as good as it got, and he was so fucking happy.