Curate, connect, and discover
Post-canon Klaus becoming obsessed with reading the paper. Violet is suspicious about this, since Klaus was never a particularly avid reader of the newspaper. He'd keep up to date on things, of course, but he wouldn't obsessively buy the paper everyday and spend entire days studying it. He also would not spend thirty minutes in front of the paper stand each morning lamenting on which one to buy as if his life was on the line at the choice he made. After months of his peculiar behaviour, she confronts him - and all he has to say is that love makes you do weird things.
Of course, this only makes her more confused, but Klaus refuses to elaborate, no matter how hard she bribes him with incentives of pretty hardcover books, opera tickets and trips to his favourite café.
It is only one month later, when she sees him jump out of his seat at the name "Quinn G.C. Damen" credited to a very well-written article in the Daily Punctilio that she realises her brother is still in love with their journalist friend that they lost many, many years ago.