Accidentally On Purpose

Billie has a fling with a young guy after breaking up with her commitment-phobic boyfriend, and ends up pregnant.

Billie discovers an unfinished note addressed to her in Zack's belongings and sets out to learn what Zack is hiding.

Billie's pregnancy makes her more attractive to members of the opposite sex, including Zack, who is turned on by her new curves.

Billie's pregnancy makes her more attractive to members of the opposite sex, including Zack, who is turned on by her new curves.

Billie tries to live vicariously through Zack and Davis by offering them dating advice.

Billie and Zack have their first big argument after Zack tries to surprise Billie by installing a low flow toilet.

Billie unintentionally causes Abby and Nick to break up when she asks them to be Godparents.

When Billie starts dating a colleague from her newspaper, Zack is unable to hide his jealousy.

Billie is threatened when James hires another film critic at the paper and sets out to prove how valuable she is.

Billie goes with Olivia and Abby to take instructional parenting classes.

Worried that she'll ruin Christmas, as she has in previous years, Billie tries to hide from her parents the fact that Zack is living with her.

Abby and Nick have their respective significant others spend time with Billie and Zack to prevent them from finding out about the surprise shower they are planning.

Billie gets some surprising news about the newspaper while working on a story with Sully.

Not wanting to sound like a nag, Billie manipulates Zack into doing chores around the apartment.

Billie invites herself to Zack's high school reunion but worries that she can't compete with his hot, ex-girlfriend in her pregnant state.

Zack is upset when Billie hires a baby nurse without consulting him.

Billie pretends to go into labor to save Zack from getting a traffic ticket after they're pulled over for speeding.

After faking labor pains to get Zack out of a speeding ticket, Billie goes into labor, for real.