They did notice when James came over to stand on their other side. He took Sirius’ hand in his, like he used to do when Sirius needed comforting in school. Too much physical contact was sometimes overwhelming to them in the earlier years, since they hadn’t been exposed to it much as a child, but hand-holding has always been fine. "Padfoot," James said in his most soothing voice, "My wife, my partner, and I are having a baby together. Biologically, they will be Regulus and Lily’s, but they will also be my child, just like how Harry is biologically mine and Lily’s, but he’s also Reg’s son." 