Why should we think he wants her back? He probably had a pre-nup and I don't think they have any kids (do they?). If that's the case there isn't jack she can do.
They, in fact, have 4 children ages 21 to 14. The youngest is 5 days different in age from his “love child”.
According to Wikipedia, they have four children:
Katherine Eunice Shriver Schwarzenegger (born December 13, 1989 in Los Angeles);
Christina Maria Aurelia Schwarzenegger (born July 23, 1991 in Los Angeles);
Patrick Schwarzenegger (born September 18, 1993 in Los Angeles); and
Christopher Sargent Shriver Schwarzenegger (born September 27, 1997 in Los Angeles).
They have four children.
Hey, they have 4 kids, where have you been?