Dan and Caroline are happily anticipating an empty nest as their daughter, Molly, gets ready for college, but everything changes when Molly reveals she is pregnant; Caroline and Dan meet Molly's boyfriend, Junior, and his parents.
Things get awkward when Caroline runs into Molly and Junior in the doctor's office waiting room; Dan goes to Miguel's boxing gym to get in shape.
When his partner shows him his vacation pictures, it pushes Dan over the edge and he buys a used RV, which does not thrill Caroline. She decides to get even but ends up in an emotional crisis. Meanwhile, Lisette gets jealous when she meets an ex-girlfriend of Miguel's, who just happens to be her son's teacher. And Junior is having trouble getting romantic with Molly in his future father-in-law's house.
Molly and Junior find that living with the Yoder family is a little too close for comfort and decide to move in with the Hernandez family. Molly finds that the Hernandez house is an even tighter fit, and that Lisette is a little over protective and not quite ready to let go of Junior. The two decide that in the interest of everyone's privacy and comfort, they should find their own place together. Meanwhile, Caroline and Dan adjust to the news of Caroline's pregnancy and also the realization that Molly has finally moved out of the house.
After landing a big client, Caroline eyes a promotion at work, but struggles to keep the pregnancy a secret until she can lock it in. Dan encourages Junior to lighten up a bit and have some fun so he considers rushing a fraternity on campus, which turns out to be Dan's old house. When Junior and Molly attend the Halloween costume party however, it becomes apparent that something has changed in the years since Dan was at school. Meanwhile, the Yoders entertain the Hernandez family for some Halloween trick-or-treating.
When Dan is short a player in his weekly basketball game, he invites Miguel to join but when Dan accidentally elbows Miguel in the mouth, the game goes from bad to worse. During the game, Lisette offers to take Caroline to her favorite Mexican restaurant for an amazing burrito but the ladies realize that they have differing opinions about the family drama surrounding them. Meanwhile, Molly is horrified to learn that the lab where Junior works is using animals for testing and it comes between them.
A visit by Lisette’s grandmother Lita, draws Molly and Caroline into a Hernandez family web of lies, including the old woman’s belief that Miguel is a lawyer.
Lisette and Caroline have very different takes on how to celebrate Thanksgiving, leaving Molly to run interference.
