Nicole Kidman</a> and Keith Urban</a> are heading Down Under to give their rocky union another shot!<br /><br />“They’ve been struggling. They need to do something to save the marriage,” a source says<br /><br />The couple just listed their Nashville getaway for a cool $3.45 million, and insiders claim they’ve been scouting homes in Australia so Kidman can be near her ailing mom, Janelle.<br /><br />“Nicole’s family is everything to her, and she really wants to be close to her mom,” said the source.<br /><br />The A-listers, both 50, have been sparring over everything from Nic’s constant cosmetic procedures to Keith’s endless touring and previous substance abuse battles.<br /><br />Each has feared the other has strayed — Nicole with old pal Russell Crowe, and Keith with opening act Kelsea Ballerini.<br /><br />“Nicole put her foot down and gave Keith an ultimatum,” the source said. “She wants him by her side, and she needs to be with her mom.”<br /><br />Insiders revealed that Urban knows Kidman’s serious, especially since her hit show Big Little Lies made her hot again in Hollywood.</a><br /><br />“She’s taking a huge risk walking away right now,” said the source.<br /><br />“But she really wants to keep an eye on Keith, and figure out once and for all where they’re headed as a couple.”
