Robert has mentioned in recent interviews about having a brother-in-law. I believe he said his brother-in- law was the one who put the ad in the paper congratulating him on his American Cinematheque award last year.
Susan has two brothers. Steven (Steve) Levin and Richard (Rich) Levin. Steve works at Team Downey and yes he's traveling with RDJ right now.
Country Los Angeles, U.S.A