The Marriage Vendetta by Caroline Madden

Eliza's playwright husband Richard Sheridan has accepted the career opportunity of a lifetime: running a prestigious theatre in Dublin. Eliza plays the role of the supportive wife - uprooting their daughter Mara, relocating from England to Dublin, running the household and managing Richard's paperwork - but inside, she's burning with resentment.

When she's sent a suggestive photo of Richard with another woman, it's the last straw. She turns to mysterious marriage therapist Ellen Early for help. But Eliza has no idea just how far Ms. Early is willing to go to get results ...