Former U.S. first lady Barbara Bush listens to her son, President George W. Bush, as he speaks at an event on social security reform in Orlando, Florida, March 18, 2005. Barbara Bush introduced President Bush at the event as part of a two-stop trip to Florida on Friday to discuss his social security plan for the future. REUTERS/Jason Reed JIR/HB 

Former U.S. presidents George W. Bush (C) and his father George H.W. Bush laugh alongside former first ladies Laura Bush (R) and Barbara Bush (L) during the dedication ceremony for the George W. Bush Presidential Center in Dallas, April 25, 2013. Obama is in Texas to stand shoulder-to-shoulder with former president George W. Bush in what could serve as a powerful reminder of the ongoing struggle against terrorism, from the Sept. 11 attacks to the Boston Marathon bombings. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

Former U.S. President George H.W. Bush participates in the coin toss ahead of the start of Super Bowl LI between the New England Patriots and the Atlanta Falcons as former first lady Barbara Bush looks on in Houston , Texas, U.S., February 5, 2017. REUTERS/Adrees Latif TPX IMAGES OF THE DAY 

U.S. First Lady Michelle Obama (L) poses with former first ladies (2nd L-R) Laura Bush, Hillary Clinton, Barbara Bush and Rosalynn Carter as they attend the dedication ceremony for the George W. Bush Presidential Center in Dallas, April 25, 2013. U.S. President Barack Obama is in Texas to stand shoulder-to-shoulder with former president George W. Bush in what could serve as a powerful reminder of the ongoing struggle against terrorism, from the Sept. 11 attacks to the Boston Marathon bombings. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

U.S. President George W. Bush (R) waves alongside his parents, former President George Bush and former first lady Barbara Bush upon their arrival Fort Hood, Texas, April 8, 2007. Bush and his family arrived at the Army Base to attend Easter Sunday church service before returning to his ranch in Crawford. REUTERS/Jason Reed (UNITED STATES) 

U.S. first lady Barbara Bush pets her dog Millie while waiting with her granddaughter Barbara for President George H.W. Bush to arrive on White House steps in this undated photo in Washington, DC, U.S.. Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush died on April 17, 2018. She was 92. REUTERS/Rick Wilking 

Bush family members pose for a group portrait before celebrating their parents' birthdays, June 10 in Houston. Seated in the front row are (L-R) Neil Bush, Texas Gov. George W. Bush, President George Bush, Florida Gov. Jeb Bush, Marvin Bush and Dorothy Koch. Spouses standing in the back row are (L-R) Sharon Bush, Laura Bush, Barbara Bush, Columba Bush, Margaret Bush and Bobby Koch. aal/Photo by Adrees A.

AAL/RC/HB 

Barbara Bush (C) speaks as her son, Republican U.S. presidential candidate Jeb Bush (R) looks on during a campaign event in Spartanburg, South Carolina February 19, 2016. REUTERS/Rainier Ehrhardt 

Former U.S. President George H.W. Bush raises hands with his wife, former first lady Barbara Bush as they await the start of the Republican U.S. Presidential candidates debate sponsored by CNN in Houston, Texas, February 25, 2016. REUTERS/Mike Stone

U.S. first lady Barbara Bush gestures during a photo shoot with celebrities at a party in Los Angeles, California, U.S., in this undated photo. Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush died on April 17, 2018. She was 92. Top row, L-R; Tom Selleck, Arnold Schwarzenegger, James Woods and Roger Moore. Middle row, L-R; Frank Sinatra, George H.W. Bush, Barbara Bush and Bob Hope. Bottom row, L-R; Tony Danza, George Schlatter, and Brooke Shields. REUTERS/Rick Wilking 

Former first lady Barbara Bush speaks during a news conference with Republican presidential candidate Mitt Romney and former President George H.W. Bush as Romney picks up their formal endorsements in Houston March 29, 2012. REUTERS/Donna Carson (UNITED STATES - Tags: POLITICS ELECTIONS HEADSHOT) 

Former first lady Barbara Bush (L) and first lady Michelle Obama walk into an event honoring the 5,000th winner of the "Daily Point of Light" award in the East Room of the White House in Washington July 15, 2013. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS) 

Former U.S. President George H. W. Bush (L) and former first lady Barbara Bush enter the East Room of the White House before the ceremony unveiling the official White House portraits of former President George W. Bush and former first lady Laura Bush in the East Room of the White House in Washington May 31, 2012. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS) 

U.S. first lady Barbara Bush is pictured with President George H.W. Bush during a presidential vacation in Kennebunkport, Maine, U.S., in this undated photo. U.S.. Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush died on April 17, 2018. She was 92. REUTERS/Rick Wilking 

U.S. first lady Barbara Bush and President George H.W. Bush greet members of the U.S. military in run up to Desert Storm on Thanksgiving Day in Saudi Arabia, November 22, 1990. Former U.S. first lady Barbara Bush, the wife of the 41st president, George H.W. Bush, and mother of the 43rd, George W. Bush died on April 17, 2018. She was 92. REUTERS/Rick Wilking 

U.S. President Barack Obama laughs alongside former first lady Barbara Bush during the dedication ceremony for the George W. Bush Presidential Center in Dallas, April 25, 2013. Obama is in Texas to stand shoulder-to-shoulder with former president George W. Bush in what could serve as a powerful reminder of the ongoing struggle against terrorism, from the Sept. 11 attacks to the Boston Marathon bombings. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

Republican presidential candidate Mitt Romney (L) picks up the formal endorsement of former President George H.W. Bush and former first lady Barbara Bush in Houston March 29, 2012. REUTERS/Donna Carson (UNITED STATES - Tags: POLITICS ELECTIONS TPX IMAGES OF THE DAY) 

Former U.S. President George W. Bush (2nd R) and former first lady Laura Bush (R) are pictured on stage alongside (L-R) First Lady Michelle Obama, President Barack Obama, former first lady Barbara Bush and former President George H.W. Bush as they attend the dedication ceremony for the George W. Bush Presidential Center in Dallas, April 25, 2013. Obama is in Texas to stand shoulder-to-shoulder with former president George W. Bush in what could serve as a powerful reminder of the ongoing struggle against terrorism, from the Sept. 11 attacks to the Boston Marathon bombings. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

Former U.S. President George. H.W. Bush (C) smiles at his wife Barbara (L), as their son and former President George W. Bush (R) laughs, during the "All Together Now - A Celebration of Service" at the John F. Kennedy Center for Performing Arts in Washington March 21, 2011. REUTERS/Jim Young (UNITED STATES - Tags: POLITICS ENTERTAINMENT IMAGES OF THE DAY) 

Michael Jackson (L) and former U.S. First Lady Barbara Bush walk near the Rose Garden at the White House in this 1980's file photo in Washington, DC. One day after Michael Jackson's sudden death, speculation was already turning to what killed the 50-year-old "King of Pop" just weeks before his long-awaited series of comeback concerts. REUTERS/Rick Wilking/Files (UNITED STATES OBITUARY ENTERTAINMENT POLITICS) 

Lady Bird Johnson (2ndL), wife of the late U.S. President Lyndon B.
Johnson, was resting comfortably in the intensive care unit of an
Austin, Texas hospital early May 3, 2002 after being rushed there the
day before, a hospital spokeswoman said. Johnson, 89, was conscious and
alert but under close observation at Seton Medical Center in Austin.
Former first ladies (L-R) Barbara Bush, Johnson, Betty Ford and Nancy
Reagan pose at the Botanic Garden Conservatory in Washington in this
May 11, 1994 file photo. REUTERS/Mannie Garcia/File Photo

SV 

German Chancellor Angela Merkel (L) talks to former U.S. President George Bush (R) and her wife Barbara (C) as they attend a ceremony of the Konrad-Adenauer foundation to mark the upcoming 20-year anniversary, in November, of the fall of the wall which once divided communist East Berlin from capitalist west Berlin, in Berlin October 31, 2009. REUTERS/Fabrizio Bensch (GERMANY POLITICS) 

U.S. Vice President George Bush and his wife Barbara with Pope John
Paul II during an audience at the Vatican, June 24, 1985.
REUTERS/Luciano Mellace

ME 

U.S. President George W. Bush (R) kisses his mother, Barbara Bush, as his father, former President George H.W. Bush (L), watches as they attend the Texas A&M University commencement ceremony in College Station, Texas, December 12, 2008. REUTERS/Larry Downing (UNITED STATES) 

Former U.S. President George H.W. Bush (R) and his wife Barbara watch the Earl Woods Memorial Pro-Am before the start of the AT&T National PGA golf tournament at Congressional Country Club in Bethesda, Maryland, July 4, 2007. REUTERS/Jonathan Ernst (UNITED STATES) 

Former first lady Barbara Bush listens to remarks during the christening ceremony of the USS George H.W. Bush at Northrop-Grumman's shipyard in Newport News, Virginia October 7, 2006. The Navy's Nimitz-class aircraft carrier is scheduled to enter service in late 2008. REUTERS/Kevin Lamarque (UNITED STATES) 

Former U.S. President George H. W. Bush and his wife Barbara Bush talk to the media in front of the restored childhood home of U.S. President George W. Bush after dedication ceremonies in Midland, Texas, April 11, 2006. The Bushes lived in the house from 1952-1955. REUTERS/Jeff Mitchell 

Former U.S. president George Bush (R) and his wife Barbara Bush (L) are seen kissing on a giant electronic screen in center field showing the "Kiss Cam" during the middle of the sixth inning in Game 4 between the Houston Astros and the St. Louis Cardinals in the National League Championship Series in Houston, Texas, October 16, 2005. Houston won the game 2-1 and lead the series three games to one. REUTERS/Mike Segar 

Former U.S. first lady Barbara Bush throws out the ceremonial first pitch to start Game 4 of the National League Championship Series, between the Houston Astros and the St. Louis Cardinals in Houston, Texas, October 17, 2004. REUTERS/Robert Galbraith JM 

Former U.S. first lady Barbara Bush takes a picture during the opening ceremony for the Presidents Cup golf tournament in Gainesville, Virginia, September 22, 2005. REUTERS/Shaun Best 

Former President George Bush gives a thumbs up with his wife Barbara at his side, after a successful parachute jump from approximately 12,500 feet at the U.S. Army Yuma Proving Ground March 25.

BUSH JUMP 

Former first lady Barbara Bush waves to fans as she walks on the field with former U.S. presidents George Bush and Bill Clinton before Super Bowl XXXIX in Jacksonville. Former first lady Barbara Bush (C) waves to fans as she walks on the field with former U.S. presidents George Bush (L) and Bill Clinton (2nd R) before Super Bowl XXXIX in Jacksonville February 6, 2005. The New England Patriots will meet the Philadelphia Eagles for the NFL championship. REUTERS/Marc Serota 

U.S. President George W. Bush (R) jokes with his mother, Barbara Bush, while speaking about Medicare at the Boisfeuillet Jones Atlanta Civic Center in Atlanta, Georgia, July 22, 2005. Bush will return to Washington later today following his speech. REUTERS/Larry Downing LSD/NL 

Barbara Bush, mother of the current president and former first lady, speaks at the Waldorf Astoria hotel in New York on August 30, 2004, during the Republican National Convention's "W Stands for Women" rally. The group reminded party faithful of US President George W. Bush's record for women's rights. REUTERS/Chip East CME 

Former U.S. first lady Barbara Bush tells the crowd to hush as she introduces her son President George W. Bush at an event in Orlando. Former U.S. first lady Barbara Bush puts her arms out to hush the applauding crowd as she introduces her son, President George W. Bush, to speak at an event on social security reform in Orlando, Florida, March 18, 2005. Barbara Bush introduced President Bush at the event as part of a two-stop trip to Florida on Friday to discuss his social security plan for the future. REUTERS/Jason Reed 

U.S. President George W. Bush watches returns from the presidential election with his family at the White House. Barney, pet terrier of the U.S. first family, walks away from a group picture of the Bush family including U.S. President George W. Bush (L) as they watch the election results of the 2004 presidential election in the West Sitting Hall of the White House residence November 2, 2004. Members of his family are daughter (L-R) daughter Barbara Bush, first lady Laura Bush, father and former President George Bush, first lady Barbara Bush, sister Doro, sister-in-law Maria Bush, brother Neil and family friend Lois Betts. REUTERS/Jason Reed US ELECTION 

U.S. first lady Laura Bush (L) and former first lady Barbara Bush attend the dedication ceremony of the World War Two memorial in Washington, May 29, 2004. The memorial honors the 16 million who served in the armed forces of the U.S. during World War II, the more than 400,000 who died, and the millions who supported the war effort from home. REUTERS/Kevin Lamarque KL/GN 

Former U.S. President George Bush speaks with his wife Barbara as their
son, Florida Republican gubernatorial candidate, incumbent Gov. Jeb
Bush, celebrates victory at his election night party in Miami, November
5, 2002. Democratic rival Bill McBride conceded in a Florida election
that made Bush the first Republican re-elected governor of the state.
REUTERS/Gary Hershorn

JLS/ME 

The parents of Texas Gov. George W. Bush, former President George Bush and his wife Barbara, react as their son came out on stage to accept the presidential nomination of the Republican party in Philadelphia August 3, 2000. Bush walked onto the platform without introduction.

JLS/JP 

Former U.S. first lady Barbara Bush acknowledges the cheers from the crowd as she speaks before the Republican National Convention August 1, 2000, in Philadelphia. The Republican National Convention devoted its second day to the message that Texas Gov. George W. Bush would protect U.S. honor and security while refusing to act as the world's policeman.

KDB/RCS 

Gov. George W. Bush gives his mother and former first lady Barbara Bush a hug after a family portrait session, June 10. The Bush family was in Houston celebrating the 75th and 74th birthdays, respectively, of the former president and first lady. aal/ Photo by Adrees A.

AAL/RC