>> i went to the after concert party, and they were just like normal. i imagine that's when they i think made the decision that perhaps they were going to get married. >> reporter: for the next three years, the couple would settle into life. william in the military, kate by his side for graduations, ceremonies and other people's weddings. then, october 2010, the wait was finally over. it was a remote spot on the slopes of mt. kenya, africa's second highest peak called rotundu. a romantic lodge with a fireplace and lots of candles. ironically, not far from where a decade earlier, william supposedly proposed to his first love. this time, it was kate. >> i took her up somewhere nice in kenya and proposed. >> it was very romantic. there's a truro m-- true romantc in there. >> you said yes? >> of course, yes.