Liza faces complications on the "Marriage Vacation" book tour. Kelsey and Zane head to Washington, D.C., to court a speechwriter's prospective memoir.

Liza worries about her daughter's online activities, Kelsey's relationship with Jake crosses a professional boundary, and Josh contemplates a long-term decision.

Kelsey is torn between Jake and Zane, Liza helps Charles retrieve an eccentric rock star's manuscript, and Diana ventures to Staten Island.

It's Christmas in New York! Liza must attend a party with Caitlin and her ex-husband, Kelsey finds herself caught up in a web of her own making as she struggles to keep both her relationships under wraps, and Charles glimpses Liza’s other life.

After the holidays, Liza adjusts to a new normal as she and Charles take their relationship to the next level. Maggie hears some hard truths from an ex, and Kelsey course-corrects her love life.