MARIA AND INJURED SON DINNER WITH OPRAH!

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Fresh out of the hospital from a boogie boarding injury, Maria Shriver's son Christopher Schwarzenegger dined in the healing glow of one Oprah Winfrey last night.

Chris, Maria and Auntie O hit Spago in Bev Hills -- and on the way out, created a HUGE quandary for the paparazzi -- who do you shoot??? O Holy Oprah? Divorcee Maria? Or recovering Christopher?