Quote from : The Lovely Bones Book

The stains could be seen only in the sunlight, so Ruth was never really aware of them until later, when she would stop at an outdoor cafe for a cup of coffee, and look down at her skirt and see the dark traces of spilled vodka or whiskey. The alcohol had the effect of making the black cloth blacker. This amused her; she had noted in her journal: 'booze affects material as it does people'.