The two have done everything they can to live life like any "normal" couple during their weekends together at the Prince's rented cottage on Anglesey, doing their own shopping, cooking and cleaning.
And although they have bodyguards on 24-hour duty protecting their isolated cottage, they have told aides they intend to carry on fending for themselves when they return home as newlyweds.
The couple believes that sharing their home with servants would ruin the intimacy of their relationship, and will carry on looking after themselves until the Prince finishes his tour of duty as an RAF Search and Rescue pilot in three years' time.
"It's very much their instinct to manage on their own," the Telegraph quoted a senior royal source as saying.
They want to do their duty and make sure they are a real asset to the country but they are private individuals who want to get on with their lives.
"Prince William is not into extravagance and, like any other young officer in the armed forces, that is how he chooses to live his life. He and Catherine live without domestic staff and they wouldn't do it any other way. That's the life they want to lead.
"The Prince is committed to his career at RAF Valley until 2013 and he wants his wife by his side during that time," the royal source added.