Chapter 35: "Laila began to laugh, and Mariam joined in. They laughed like this, at each other's reflection in the mirror, their eyes tearing, and the moment was so natural, so effortless, that suddenly Mariam started telling her about Jalil, and Nana, and the jinn. Laila stood with her hands idle on Mariam's shoulders, eyes locked on Maraiam's face in the mirror. Out the words came, like blood gushing from an artery." (Hosseini 228)
The significance of this quote is that Mariam and Laila are opening up and getting along with each other. This will lead them to work together and make each other's life easier.