Delia's action shows that she loves her new husband Jim enough that she is willing to sacrifice something she values in order to get him a Christmas gift. She has an unselfish, loving character.
A metonymy is when you use a concept to denote a different concept that is close to meaning. It's when you say Hollywood makes great movies, but it's not really hollywood, it's the studios who exist in hollywood. Apply this logic to your lines since you didn't provide them here.
