She did. And the other thing that she generally did was to keep her opinions to herself and let Reagan be the President. She was considerably less socially conservative than he was (she seems to have been pro-abortion, for example), but she knew that people had elected him and not her.
She was generally very dignified and courteous, and was not a discordant presence the way you-know-who is. Of course, nobody’s dignified and courteous anymore, so I guess her style wouldn’t be appreciated now.
I disagree that she kept all of her opinions to herself. Even the biggest Reagan fans from his White House staff agreed that Nancy was a strong force. Reagan's first chief of staff Don Regan clashed with Nancy and was not kind to her in his 1988 memoir.
Nancy wielded her influence much differently than Hillary or Rosalyn Carter. Definitely more gracefully.