Fame, Gold Wong/FilmMagic
Charlotte Triggs
July 31, 2011 04:30 PM

Maria Shriver and Arnold Schwarzenegger came together this weekend to celebrate the former governor’s 64th birthday, a source confirms to PEOPLE.

Shriver, 55, who filed for divorce from Schwarzenegger earlier this month, reportedly ate lunch at Beverly Hills restaurant Casa Roma on Saturday before going shopping together.

“Children and family come first,” says a source who knows the family.

RELATED: Christopher Schwarzenegger Released From Hospital

Adds a second source: “Arnold and Maria will always come together when it comes to supporting and loving their children.”

The couple’s son Christopher was released from the hospital Monday after a boogie boarding accident left him with a collapsed lung and broken bones.

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