I just found out that Robin's mother, Barbara Gibb, is still alive. This is the third son she's buried. How horribly sad is that?
Robin's twin, Maurice, died in 2003. Andy Gibb, never with the Bee Gees, but a star in his own right, died at the young age of 30 in 1988 from a heart ailment. As the article states Robin wondered if all this tragedy was a "karmic price" the family paid for their success.
TIS
http://music.yahoo.com/news/gibb-matriarch-loses-third-son-robins-death-160400465.html