He can feel the change. Sure, it's not the first bond that Daniel has had, but this one is so different in nature that it feels entirely different. It feels like something suddenly opening a door within himself, and letting something else in-- but not unwanted, not this time. Instead it feels soft, and warm, like a second heart beating right next to his own.

Daniel recognizes that they must be Robby's feelings. And that Robby, in turn, must be feeling what he's feeling right now, even if the emotions aren't very different. Both warm, grateful, and just.. loving.

Especially since the bond probably kicks in right in time for Robby to experience the little jump Daniel's own heart makes when Robby calls him dad. He doesn't think he'll ever get used to it, let alone take it for granted.

He slowly releases his hold on Robby's wrist, feeling some of the paste still sticky on his hand, but also now able to see the mark below on his son's skin.

".. I guess it worked," he says, like it's even necessary. Like they can't both feel as much in this moment, sitting there and smiling.