Yes, two days after visiting her he had a sit down interview with an American host, supposed to be about Invictus, but went along the lines of 'so you have just been to see your Grandma" and he was (I'm paraphrasing) Oh, granny thinks I am very funny, I make her laugh, I wanted to make sure she has the right people around her, blah, blah, blah ......... The interview was supposed to be about Invictus, but I doubt anyone remembers any of that, just him talking about granny, don't think he used her title.
This one will probably go a similar way, 'the minute I heard Pa was ill, I hopped on a plane to see my dear Pa, despite other commitments, I made sure to see him in person blah, blah.
Someone on another thread has said they have now pulled that segment from the interview, either for fear of further backlash or because of protests from the King.