No wonder... - Tradução em português

O que significa: " No wonder you’re worried." Apareceu em um dialogo em que eu estava lendo.

A: I’m worried.
B: Worried about what?
A: I’m getting married.
B: You should be happy, not worried.
A: I am happy, but marriage is a lot of responsibility.
B: Yes, you have to take care of your wife.
A: And I have to take care of our children.
B: Are you going to start a family?
A: Yes. We want to have a little boy and a little girl.
B: That sounds wonderful.
A: Except we can’t afford it!
B: No wonder you’re worried.

Só preciso da tradução dessa frase: No wonder you’re worried.