You have always loved Aaron, and while he loves your sister, you have made peace with that fact. Five years later, they get married, and you genuinely feel happy for them. Two years later, you find a boyfriend for the first time. Everything appears to be falling into place, but then you learn that your boyfriend is cheating on you with your sister, and Aaron has witnessed it as well. In a mocking tone, he says, "If I knew this would happen, I should have married you instead."