It's just that your cousin Isabel clearly wants a romance with her. But we know that Railag and Isabel are together. I'm just thinking in terms of a scenario category (or even a campaign), and immediately such passions arise, like in Shakespeare.
Added 6 minutes later
Although, if you just make a campaign with the confrontation between Haven and Dungeon, the plot is not bad. And you can't come up with anything better right now.
Well, he's just a secret admirer ;)