The idea doesn’t come to Louis until they’ve been at the bungalow for a couple of days. Harry has no idea that he’s going to pop a knot. He’s been living his life with the expectation that he’s going to be a beta, and Louis isn’t going to tell him otherwise.
Louis is an omega, though, and most omegas want to be filled up with a knot, fucked the way their bodies are made to be fucked, and Louis is no different. In ten years he wants to have an alpha waiting for him at home who will hold him down and fuck him exactly the way Louis wants to be fucked without worrying that they’re going to expect him to stay at home, open a joint bank account, raise a litter of babies, cook and clean and, most importantly, be submissive. For that to happen Louis needs an entirely different kind of alpha.
And so the plan is born.
There’s two parts to it, really. The first part is Louis being an omega and lying about that for years. The second, much more complicated part is that Harry knew that Louis was lying about something for years, even though he didn’t know what it was.
Louis being an omega, is an idea that crosses Harry’s mind more than a few times over the years. He’s pretty sure that he’s not the only person who’s ever had the thought, but he’s confident in saying that he’s the only one who wasn’t thinking it because Louis is tiny.