Imagine Person A's older Sibling talking to their friends about how Person A was dating B and has a treehouse A And B go up to. Their friends want to see it, so one day when A and B go up in the treehouse, A's sibling and their friends follow them and records what A and B do up there, they mostly told Jokes, and once Made out. A's siblings friends shares the video with the whole school. When A and B walk into the school people are whispering and smiling at them
Either
A and B don't talk with each other
Or
A pecks B's cheek in front of everyone.