상황설명
- desperate housewives  위기의 주부들
- 시즌 5, 에피소드 22

- 수잔과 잭슨은 가짜 결혼에 대해서 이야기를 합니다.  수잔은 결혼식 후, 케익을 사줘야 한다고 말합니다. 

 
it's the one part of marriage that never lets you down.

let sb down
- to disappoint someone by failing to do what you agreed to do or were expected to do:
예문 You will be there tomorrow - you won't let me down, will you?
예문 When I was sent to prison, I really felt I had let my parents down.