Oh my god! D'ya think you're the first one to tell me somethin' like that?

[He has to laugh at her mirth, grateful for her kindness. Unconsciously, the arm around her tightens slightly as he tries to match his steps with hers, although he does notice something-

She seems uncomfortable, so he immediately covers his mouth with his free hand.]

Whoa. My breath smells that bad, huh? Sorry. I'll... When we stop somewhere I'll have some water. Yeah!