Two polyamorous couples are redefining what it means to be a family as they raise their four children together under one roof. With a new baby on the way and the dads butting heads about parenting, the quad struggles to get on the same page.

When the quad brings home their fifth child, Alysia tries to define her role as the non-biological mother. Family members attend a party to meet the new baby, but not everyone is supportive. Unexpected news regarding Quintin's paternity shocks the quad.

While in Portland for Taya's birthday, the quad gets wild in a hot tub. Taya confesses that she's interested in a connection with another woman, and Sean and Tyler come face-to-face about their son's paternity.