iVillage Entertainment

Here's a twist to Reese Witherspoon and Ryan Phillippe's split: He may be cheating! According to the National Enquirer, Reese ended her marriage after she finding secret messages that husband Ryan sent to another woman on his BlackBerry. They also report that Ryan has become "EXTREMELY" close to Abbie Cornish, who is his pretty costar in the upcoming film Stop Loss. On their last day of filming in Texas, Ryan and Abbie had a "cozy dinner" together. "They came into the restaurant a month ago, both casually dressed in warm-up outfits," an eyewitness told The Enquirer. "They asked for the restaurant staff to pull curtains around their table, so no one could see them." But, according to one unconfirmed posting on an internet blog, a diner could see around the partition and claimed to watch them making out. "We sat two tables away from Phillippe and an extremely attractive blonde (not Reese)," a blogger wrote on Pink is the new Blog. "The couple had a partition placed around their table soon after they arrived, but we could still see their legs intertwined under the table. "As we left, we could see them clearly making out behind the partition" said the blogger. The defining moment in their relationship reportedly came after the New York premiere of Flags of Our Fathers on October 16. R&R happily posed for photogs, but that night -- back at their hotel -- Reese found Ryan's BlackBerry and she read it. "Ryan was caught red-handed," a source tells the tab. "All he could say was he didn't mean what he'd written to the other woman."