Who's On First

Madeleine: "I'm going to Southside tomorrow."
Sonnet: "With whom?"
Madeleine: "Izzy, Izzy and Lizzy."
Me: "Izzy and Izzy?"
Madeleine: "And Lizzy."
Me: ""Is it Izzy or is it Lizzy?"
Madeleine: "It's Izzy, Izzy and Lizzy Dad."
Me: "Lizzy Izzy?"
Madeleine: "No, Lizzy, Izzy and Izzy."
Sonnet: "Can you stop that now?"