The House of Windsor laid bare:

Here's the final proof!

Below are the all-telling, all-revealing DNA profiles of Prince Harry and his older sibling Prince William (in a family newspaper like The Bug, we won't even try to explain how we got his sample!).
As you can see from the profiles, both share on the left the X chromosome traits of their late mother, the beautiful Princess Diana. But check out the right side of each profile! While Prince William clearly has inherited the Y chromosome traits of the Royal House of Windsor, Prince Harry's equivalent genetic fingerprint points clearly in the direction of love rat and cad James Hewitt!