Article continues below advertisementQueen Camilla has reportedly been worried about how she's perceived by the public ever since husband King Charles took over the throne - but an insider revealed the couple's recent trip to America has finally calmed her nerves.So much so, a source told a news outlet that Prince William's stepmother, 78, is no longer afraid to lay down the law with Kate Middleton, 44, and let her know she's the royal family's leading lady.Article continues below advertisementQueen Camilla Is on Cloud Nine After U.S.