By Emily Rome
Updated January 25, 2013 at 12:00 PM EST

Kristen Stewart and Robert Pattinson may be back together, but things aren’t looking as happily-ever-after for the other couple in Stewart’s cheating scandal of last summer: Liberty Ross, the wife of Stewart’s Snow White and the Huntsman director, has filed for divorce, People reports.

Sanders, who has filed his response to the divorce petition, and Ross are both seeking joint custody of their 5-year-old and 7-year-old children.

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