I remember the picture, it is from a video as Ellie mentioned!! One of the most hilarious moments on the Lamebridges relationship
The video was done on a Saturday evening, when they were leaving a pub, in the countryside. That very same evening, The Sun Sunday edition that exposed Uncle Gary was made public. The story that came with it was that at the time was they were having a cozy and quiet dinner, and suddenly they saw the news about The Sun story on their phones. Kate left the pub running and in tears, super ashamed, and William followed to the parking lot and took her in his arms and said she was the love of his life and gave her passionate kiss.
Paps just happened to to be in the parking lot of a pub in the middle of nowhere and caught them in a kiss
IIRC the pictures and the fanfiction story was published on the Daily Mail hours after the Uncle Gary story broke. Most lame fabricated pap stunt from them