Blended Family Drama Unfolds in Rochester

Cynthia D'Aprix Sweeney's new novel 'Lake Effect' explores the aftermath of an affair that brings two families together.

Published on Mar. 4, 2026

In her third book, 'Lake Effect,' author Cynthia D'Aprix Sweeney explores the dynamics of a blended family formed after the affair between the parents of two sets of siblings - the Larkins and the Finnegans - in 1970s Rochester, New York. The novel follows the two families over the years as they navigate the fallout from the scandal and the unexpected connections that form between the once-estranged stepsiblings.

Why it matters

Sweeney's novel taps into the growing popularity of 'four-sibling' family dramas in contemporary American literature, which often examine the complex dynamics and lingering effects of dysfunctional childhoods on adult relationships. 'Lake Effect' offers a fresh take on this subgenre by focusing on the blending of two families, rather than the traditional single family unit.

The details

The story begins in 1977 when the Larkin and Finnegan families, who are neighbors in Rochester, are upended by the affair and subsequent elopement of the parents, Nina Larkin and Finn Finnegan. The novel then follows the four teenage siblings - Clara and Bridie Larkin, and Dune and Fern Finnegan - as they navigate the fallout from their parents' actions and the unexpected bond that forms between the stepsiblings. The narrative spans into the 1990s, when the adult siblings are 'summoned to the stage one more time' for another family event.

  • In 1977, the Larkin and Finnegan families were neighbors in Rochester, New York.
  • That year, Nina Larkin and Finn Finnegan had an affair and eloped, shocking their small, tight-knit community.
  • The novel then follows the four teenage siblings over the years into the 1990s.

The players

Clara Larkin

One of the Larkin siblings, who defers her acceptance to Cornell to care for her sister after their mother's elopement.

Bridie Larkin

Clara's sister, who ends up attending Cornell as a freshman after their mother's departure.

Dune Finnegan

One of the Finnegan siblings, who ends a teenage romance with Clara after the families are blended.

Finn Finnegan

The father of the Finnegan siblings, who has an affair with and then elopes with Nina Larkin, the mother of the Larkin siblings.

Nina Larkin

The mother of the Larkin siblings, who has an affair with and then elopes with Finn Finnegan, the father of the Finnegan siblings.

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What they’re saying

“She enjoyed performing deception now that they were safely husband and wife.”

— Nina Larkin (dnyuz.com)

What’s next

The novel follows the two families over the years, including a wedding, a birth, and a death that bring the adult siblings together again.

The takeaway

Sweeney's 'Lake Effect' offers a fresh take on the popular 'four-sibling' family drama genre by exploring the dynamics of a blended family formed after a scandalous affair, highlighting the lingering effects of parental choices on the lives of their children.