Charles is upset that Kelsey spent $400,000 on Kai Manning’s book, especially when there may be no substance to the book.

Liza then goes to Montauk to spend time with Kai to get material for his book.

Liza gets to know Kai better and discusses what type of book he may write.

Kai then propositions Liza, but she decides against.

The pair then go surfing the next day, and afterward, while in the shower, they have sex.

Liza comes back to work with Kai’s journals, but she, Kelsey, and Lauren realize there’s nothing they can use.

Liza, Kelsey, and Maggie brainstorm, and they come up with Kai writing a surf-theme sex book.

Empirical is publishing Quinn’s next book, and she gets cozy with Charles.

Quinn goes to a meet with Charles, Kelsey, and Lauren, and during it, Charles gets a call from Quinn’s assistant about a surprise party for Quinn.

Charles then tries to get Quinn to her surprise party, but Quinn takes the trio out to Dave & Buster’s instead.

Charles then drops Quinn off at her surprise party, and the pair share a kiss.

Quinn then gets Liza’s “permission” to date Charles.

Kelsey confides in Quinn she regrets not taking Quinn up on her offer.

Josh keeps seeing KT and learns she doesn’t want children.