Both thanks and I'm sorry fight to be said first, and it's a matter of effort that he says the former.
"I- I guess there are worse reasons."
There's a spark of adrenaline at the thought of going back, because what if those kids are still there? - and that thought he has enough logic back in him to shut back down, because they are just kids, and shouldn't realistically have any idea as to what's going on with him.
"... If you're sure."
Because he does still feel bad about making Jim follow him all this way (wait, how far did he even run? Walter feels like he's not going to like the answer), and if getting some of that cake for the both of them sounds like it'll even the scales or something, or just make Jim worry less, then that's just what they're gonna do.
Me: aaaaaaaa. ;a; Also: eye color is a sort of hazel brown?
"I- I guess there are worse reasons."
There's a spark of adrenaline at the thought of going back, because what if those kids are still there? - and that thought he has enough logic back in him to shut back down, because they are just kids, and shouldn't realistically have any idea as to what's going on with him.
"... If you're sure."
Because he does still feel bad about making Jim follow him all this way (wait, how far did he even run? Walter feels like he's not going to like the answer), and if getting some of that cake for the both of them sounds like it'll even the scales or something, or just make Jim worry less, then that's just what they're gonna do.