Darla The Ditzy Bride...Spoilers

I really wanted to see her and the brother get theirs. She was the worst one could imagine. She was actually going to go through with the wedding While being pregnant and in love with the grooms brother. I wanted to see a clip of them after a year or so with them both being miserable as the brother looks on. I also hoped the Groom had Punched his brother in the mouth and told his fiance off.

Was wondering how did they end up in the book.