Jean-Paul's kids are half-siblings.
It is quite common for male celebrities to marry much younger women and have children with them (examples include Charlie Chaplin, Dennis Hopper, Rupert Murdoch, Donald Trump, and Clint Eastwood). Often, the celebrity man will have grown children (who might even have children of their own) when he has kids with his younger wife.
This message was edited 1/10/2011, 2:15 PM