Sirius was fully prepared for Teddy to freak the fuck out. He seemed to be well on the way to it when he suddenly pushed it down in the most Remus move ever. He could almost see his brain compartmentalizing and saving fear and grief and pain for later. If there was any doubt that this was Moonys kid then it was gone now.
"There's lots you can do, but you don't need to worry about that yet. Moony, Teddy runs a bakery, isn't that great? He makes a donut so hot it can cause brain damage!" Okay, and maybe that was an exaggeration, but he thought Remus might need a moment to process the expression of unconditional love Teddy had just offered him. He pulled slightly back, making room for Remus if he was ready for that hug now, but he wouldn't push it again.