who's on first?

Riding home in the car with Lucy and her friend G:
G: Something something something (The radio was on+car noise+I'm not as clued into her pronunciation as my daughter's)
L: "G, what you say?"
Silence.
L: "G, what you say?"
G: "What you say?"
L: "What you say?"
G: "What I say?"
L: "Momma, what G say?"
H: "I'm not sure. G, can you say it over again?"
G: "What I say?"
H: "What are we saying?"