Maria Shriver and Mildred Patricia Baena were both pregnant with Arnold's children ... AT THE SAME TIME.
And get this ... the two kids were born less than a WEEK APART -- Maria's son Christopher was born on September 27, 1997 ... and Mildred's love child was born on October 2, 1997.
The two boys are now 13 years old.
Arnold's Baby Mom & Maria
Preggo at Same Time
5/18/2011 8:30 AM PDT BY TMZ STAFF
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