The now official throuple commit to cohabitation, face the disapproval of friends and family, and stand their ground in a bold, painful, and permanent way.

The throuple come out at a neighborhood party, spinning the gathering out of control and cracking open a fresh can of troubles. Carmen and Dave try to make amends for their prudishness by inviting Jack, Emma, and Izzy on an unusual double date.

Jack's still caved out at big bro's house, Izzy's trying to coax the married couple back together, and after things go bad at work, Emma's not at all sure about what she really-really wants.

Izzy and Emma are stunned by Jack's proposal: What if the three of them really did have a baby together? But before they have time to delve deeper, they'll have to talk their way out of a tight spot with Emma's parents.