As a former victim, I have researched the lying phenomenon as part of my 'cure'
I recommend reading this
Chronic Lying
It has been hypothesized that chronic or pathological lying is not a mental disorder of it's own. In fact, it is not recognized in the DSM-IV (The Diagnostic Manual used to describe mental illnesses). Instead, it is viewed as a symptom of another mental disorder that is present, such as delusional thinking, psychopathy, or narcissism.
You have had a lucky escape if you could only realise it.