The House on Mango Street Chapter 7 - Laughter
Esperanza doesn't think that she and Nenny look like sisters, as opposed to the obvious similarities between Lucy and Rachel (with their lips). However, they laugh in the same loud, cackling, boisterous, sudden outburst of happiness. One day, Esperanza spies a house that looks like Mexico. Before Rachel and Lucy can laugh, Nenny agrees that the house does, in fact, look like Mexico.