When Bridget and Walden's mother try to take control of Walden's company, Walden puts Alan on the board. But can he be trusted once Walden's mother gets to him?
Alan and Lyndsey introduce their mothers to each other, while Walden spends the night hanging out with Jake and Eldrige since Zoey is still out of town.
Zoe is upset when she finds out that Bridget is a business partner in Walden's latest venture, while Alan and Lyndsey have an awkward dinner with their moms, who are now lovers and are planning to move in together.
Walden's commitment is tested when Zoey and her daughter come to live with him. Meanwhile, Alan gets more than he bargained for when he moves in with Lyndsey.
Alan decides to take advantage of the guilt felt by his family and Walden after his heart attack, but Zoe knows that he's just milking it and sets out to prove it.
Jake and Eldridge make an important decision about their future after they graduate from high school and get fired from their jobs at Walden's new company.
Alan loses Lyndsey over his refusal to make a long-term commitment, while Walden becomes a "boy toy" for a rich older woman who has no idea that he's a billionaire.
While Walden takes a job as a Christmas tree salesman as part of his ruse, he gets a billion dollar business proposal from Mark Zuckerberg. Meanwhile, Alan finds himself completely alone at the beach house for the holidays.