Something has changed in the relationship between Heidi Klum and her bodyguard/boyfriend Martin Kristen. For the first time they are out in the open with their affection. In other words, they are holding hands in front of the children. In the past they have always kept a professional and discreet distance when Heidi’s four offspring were around. This weekend Heidi and Martin were very much a couple at the park where the kids were playing soccer. Which reminds us of the dilemma: How does Martin know when he’s ON or OFF duty? One more tiny problem for Heidi: She just debuted as a judge on “America’s Got Talent” and the audience is finding her German accent difficult to understand.