Affairs can cost you your marriage — they can also cost you your life.

The first episode of Dicovery ID's Fatal Affairs: Lessons in Lust focuses on the clandestine relationship between Baton Rouge school teacher Lyntell Washington and assistant principal Robert Marks, and the deadly love triangle that followed. 

The illicit affair ended in a horrific murder of a pregnant Washington, with her toddler the only eyewitness.

The series was produced in the UK by October Films.