It wasn't exactly unheard of, not in his time anyway. "A son." All he could do was shrug and offer, "Congratulations?" Where was this son? He had only heard one child. He was good at hiding the questions, keeping them from showing on his face.
He snorted a bit as he took another sip of coffee. "She seems to like building things too. Often that fixes other things." Lowering the mug he looked down at the dark liquid in question. "Nah. It helps me sleep." It helped him do a lot of things, or so he claimed. "You're breaking rule number 23, but you're new so I'll go easy on you." He teased. With the dead pan way he delivered, it would be hard to tell that it was just that. But Gibbs was the new one rather than Robin. But Robin was new to the rules.