Hello! I'm not sure if you accept fanfic requests, but you're one of the few writers who creates stories about F1 WAGs, so I had to at least give it a try. First of all, I apologize if this isn't the kind of request you enjoy receiving.
My idea is this: the reader is a very famous country singer, with a true cowboy/cowgirl aesthetic, who meets Alexandra at a club. The two end up having a one-night stand. Alex is married to Leclerc, and their relationship is full of breakups and reconciliations, though the media is completely unaware of it. Whenever Alex and Leclerc break up, she starts seeing the reader. After some time, however, she ends things with the reader and goes back to Leclerc. This cycle continues for years, and both Leclerc and the reader are fully aware of each other's existence. The situation finally reaches a breaking point when Alex experiences a pregnancy scare and realizes she doesn't know which of the two would be the father. When the reader finds out about it, she decides she can no longer live this way. She gives Alex an ultimatum: either stay married to Leclerc and never contact the reader again, or file for divorce and commit to building a stable, lasting relationship with the reader.