Bobby couldn't help but laugh a bit at the toddler's reaction to Dean and Bela sleeping in the same room with one another. He really didn't want to think about it but he said anyway, "Girls are definitely good for that. You'll find out when you're a little older, no doubt."
When Sam put his hand on his face he pretended like he was going to bite it. "Waffles sound okay but not as good as Sammy hand!" Bobby made growling noises and went after his hand again.
Bobby did notice the baby mentioning his Daddy and he tried to distract the toddler with something else. There was no way he was going to go down that road with him. Plus, he didn't know what Dean had told him about John not being around.