<p>The pair and their sons Patrick, 17, and Christopher, 13, met for lunch at Barney's on Saturday in Beverly Hills, California, reported Us magazine.<br /><br />Schwarzenegger and Shriver, 55, were seen in the same car arriving at the restaurant. An onlooker said there didn't seem to be "any tension" between the exes. The group - including Christopher, who was just released from the hospital on Tuesday after a surfing accident - "seemed relaxed."<br /><br />Schwarzenegger "smiled a lot," and it seemed "pretty normal" for the family to be together. Shriver apparently footed the bill.<br /><br />"Maria grabbed for it. She was already pulling out her wallet and gave her credit card [to the waiter]. While she gave him the card, she also ordered Arnold an espresso," the onlooker said.<br /><br />The chef even brought out a special treat for the birthday guy - a Tiramisu on the house. He and his sons took a few bites before leaving together. He said "Bye, darling" to Shriver.</p>
<p>The pair and their sons Patrick, 17, and Christopher, 13, met for lunch at Barney's on Saturday in Beverly Hills, California, reported Us magazine.<br /><br />Schwarzenegger and Shriver, 55, were seen in the same car arriving at the restaurant. An onlooker said there didn't seem to be "any tension" between the exes. The group - including Christopher, who was just released from the hospital on Tuesday after a surfing accident - "seemed relaxed."<br /><br />Schwarzenegger "smiled a lot," and it seemed "pretty normal" for the family to be together. Shriver apparently footed the bill.<br /><br />"Maria grabbed for it. She was already pulling out her wallet and gave her credit card [to the waiter]. While she gave him the card, she also ordered Arnold an espresso," the onlooker said.<br /><br />The chef even brought out a special treat for the birthday guy - a Tiramisu on the house. He and his sons took a few bites before leaving together. He said "Bye, darling" to Shriver.</p>