Hadley takes a small measure of delight in the smudge of lipstick on her collar, ... I know the meaning of take delight in but I don't understand the meaning of the sentence.
Does it simply mean she was sorrowing over her collar got dirty by lipstick?
Here is the fuller text:
Prada woman marches past with her cupcakes, her nose in the air, and Hadley takes a small measure of delight in the smudge of lipstick on her collar, knowing lipstick, especially red lipstick, is very difficult to get out.
Hadley and Grace by Suzanne Redfearn