Robert Kraft, Sheryl Sandberg spotted at Sun Valley’s ‘billionaire summer camp’

Robert Kraft played tennis with his younger, glamorous fiancée, and Meta's outgoing operating chief Sheryl Sandberg 

Arrived at the annual "summer camp for billionaires" in posh Idaho resorts with her own fiance

It was Wednesday that Kraft, 80, was photographed next to his fiance Dana Blumberg, 47, a New York-based ophthalmologist

Since March, the couple has been engaged

Myra Hiatt Kraft, the wife of Kraft's billionaire business partner who bought the Patriots, lost her battle with cancer in 2011

During the three decades that Kraft owned the team, he dated actor Ricki Noel Lander for six years before they ended their relationship in 2018

Mark Zuckerberg's No. 2 had been pictured strolling with marketing executive Tom Bernthal

Last month, the author of "Lean In" stepped down as chief operating officer of Facebook's parent company