Dr. Jill Biden is getting candid about her marriage to Joe Biden, what she's learned from her divorce, and more. In a new interview with , Dr. Biden, who covers the magazine's June/July Freedom Issue — the publication's first cover featuring a first lady in its 155-year history -- shared how her past has informed her future and the funny way she fights with the President.In an effort to avoid fighting in front of the Secret Service, the couple coined the term «fexting» or fighting over text -- something they came up with during Barack Obama's time in the White House.«Joe said, 'You realize that’s going to go down in history.