Luke and Lizzy, inseparable pals since childhood, decide to have a child together as friends; Lizzy finds out she is pregnant just as Luke announces his sudden marriage to Prudence, complicating their previously agreed upon arrangement.

Prudence moves into Luke and Lizzy's apartment -- along with a mess of belongings; Lizzy is forced to deal with repressed feelings; Luke has trouble sleeping with Prudence's marionettes around.

Luke and Prudence help Lizzy make a date with her secret crush; Prudence realizes Lizzy's pregnancy is making her feel left out.

When Prudence tries to convince Luke and Lizzy to spice up their lives, Luke decides to try skydiving.

Luke, Prudence and Lizzy learn Luke and Prudence's wedding is not legal, so Lizzy decides to plan a new wedding; the group gets a surprise about Prudence's past.

After Luke learns about a secret that Prudence has been keeping from everyone, he disappears, leaving both their future and her immigration status in serious jeopardy. While Lizzy attempts to console Prudence and fix the situation, Luke hits the bars with Marcus. And when all looks lost, Lizzy jumps in with a big, bold solution that will catch everyone by surprise.