I realize thirty is just a number, that you're only as old as you feel and all that. I also realize that in the grand scheme of things, thirty is still young. But it's not that young.

However on her 30th birthday Rachel drinks too much and sleeps with Darcy's fiance Dexter. While doing revisions on Something Borrowed Emily Giffin found the inspiration for a sequel Something Blue. When Ben changes his mind Claudia is forced to reevaluate her reasons for not wanting children.