And finally, the big plot twist in Williams's story: Jenna's surprise baby news. The book concludes with an unexpected, yet endearing ending where baby-obsessed Jenna finally has the kid she's always wanted, unbeknownst to Eric — who she doesn't inform that they have a child together (a son named after Eric's father, Otis) until years later when they randomly run into each other at a Brooklyn park. Turns out, Jenna was pregnant when she and Eric left Stylezine behind, but she never told him because she didn't want to get in the way of him living out his 20s and film aspirations. However, the movie completely flips this ending into something a bit more controversial.
Unlike Eric in the book, who beams with excitement when he learns about his son with Jenna, Eric in the movie has a less than enthusiastic reaction to Jenna's pregnancy. A few months after splitting, the two meet up at a coffee shop where Union's Jenna presents Eric with an ultrasound photo of their baby. At first, he expresses that he's not ready to process the news and storms out on Jenna. However, Eric eventually comes around in the end when he reunites with Jenna at her doctor's appointment. The two learn they're having a son, who they decide to name after Eric's late father, Otis. The film ends with the reunited couple attending Darcy's big gala with a pregnant Jenna proudly showing off her baby bump.