The Golden Couple by Greer Hendricks

Wealthy Washington suburbanites Marissa and Matthew Bishop seem to have it all―until Marissa is unfaithful. Beneath their veneer of perfection is a relationship riven by work and a lack of intimacy. She wants to repair things for the sake of their eight-year-old son and because she loves her husband. Enter Avery Chambers.

Avery is a therapist who lost her professional license. Still, it doesn’t stop her from counseling those in crisis, though they have to adhere to her unorthodox methods. And the Bishops are desperate.
When they glide through Avery’s door and Marissa reveals her infidelity, all three are set on a collision course. Because the biggest secrets in the room are still hidden, and it’s no longer simply a marriage that’s in danger.