Word entry: Living in Sin

1. "...that morning light so coldly would delineate the scrapes of last night's cheese and three sepulchral bottles" (Page 859)
2. My guess: It is an adjective which describe the bottles. In here, because the speaker used the word "coldly" to describe the scene of last night's dinner (cheese), so I believe sepulchral presents the image of  bottles that are unclear or dark.  
3. Definition: 1. of, pertaining to, or serving as a tomb.  2. of or pertaining to burial.  3.proper to or   suggestive of a tomb; funereal or dismal. (Dictionary.com)
4. Explanation: What a strong feeling ! now I know that the speaker use the "sepulchral" bottles to describe her own feeling (or perhaps of her marriage to the milkman) is like a tomb, like dark bottles, full of disappointments.