A remarkably closely guarded secret

The following words appeared in a March 2005 article in Arab News by Barbara Ferguson:

Even by the discreet standards of Washington’s powerful inner circle, their relationship is a remarkably closely guarded secret. The Washington Post says the couple rarely goes out together or demonstrates affection publicly, according to friends who are aware of the relationship. They attend low-key Washington social events and visit friends’ homes together and _____ also sometimes goes to official functions and dinners with him, but is not identified as his partner, an acquaintance said.

Who are the two people being spoken of?

Answer: (select the text below to show)

Paul Wolfowitz and Shaha Riza. (Source.)

Question by Amit Varma