Probably because of coming Olympics, Royal members are coming out one-by-one to attend these sports events.
Whenever it comes to Dailymail article, I seldom read the article itself, usually go directly to the comment section, which is always the most wonderful part of Dailymail. It's funny to see people can be so hostile to one person out of no reason. And some people just start to speculate there are some issues between William and Kate because William kissed Graff but not Kate. Too much imagination here. I think Kate and William haven't carried out many Royal duties so far mainly due to they don't want to upstage the senior members of the family.