If it isn't his, there's every possibility that he'll be so disappointed he'll actually cry... Which is why he probably shouldn't get his hopes up.

"If it's not mine, I'm not gonna think I wasted nine months of my life looking out for you and the baby, if that's what you think." He feels like he's going around in circles with her and this conversation though and it makes him lose his appetite. "I'm going to bed," he announces, getting up from the couch and heading towards his bedroom. Or is their bedroom now? Either way, he goes to brush his teeth before bed.