One morning, David finds the two sleeping in their bed and contemplates killing them both with his gun but ultimately refrains, seeking solace at his father's home.
Unaware of her father's knowledge, Jess discloses her mother's "cheating," leading to tense explanations about their agreement to see other people.
The couple discusses their post-separation future, exposing David's washed-up rock artist status and Nikki's contemplation of a law career.
In the early morning, he struggles to bond with his sons, Alex, Theo, and Bug, over the comedy of Mitch Hedberg, revealing the strain on the family.
A heated argument with Nikki ensues after she confronts David about his visit, where she accuses him of confusing their kids about their future as a family.
The day turns sour when Jess's rocket fails to launch, and in her frustration, she explodes on him over his unwillingness to mend his marriage.
The site's critical consensus reads, "The Killing of Two Lovers unites deft direction and an artfully assembled cast in service of a powerful story.