Kate has been around for 3 years, she's been on ski trips with the Wales family. This whole thing about her being introduced to the family is directed at the fact that she's meeting the
extended family. Kate met Charles and Harry 2 years ago (if not before) at the Klosters ski trip.
Another note on that topic/reasoning I'm unbelievable close with my sister (she even lived in another country then me for two years) and she wasn't the
first to meet any of my serious boyfriends or even the man I'm marrying. I see my sister all the time now, we live in the same state, and I have yet to meet her boyfriend, things have just worked out that he's not available when we hang out. (Mainly because
no man wants to go shopping with the two of us-they recognize our shopping trips are all day excursions!
) '
I guess what I'm saying is I don't think it's fair to judge the closeness of William and Harry's relationship off of whether they've met one another's significant others first or not.