Pathological lying IS, in fact, a way the brain is wired in some people. For 100 years or so, ever since we as a species became aware enough of our bodies and started looking into human beings who behaved in a manner outside of what we consider normal as perhaps not insane or "mad," and needing incarceration in an insane asylum, but lacking something, one of the illnesses described is this pathological lying and so it got its name.
One of our major problems has been that we, again as a species, have tended to think of our body as one thing and our mind as another. This is false. The brain contains and operates the mind. Our minds are just as much a part of our bodies as are our arms or legs. Our minds are physical. You know the newer question: Nature or nurture? Well, yeah, how we were raised CAN affect our behavior, as can what we eat and drink. Look at what alcohol and drugs do! But nurture, as in alcohol, drugs, food, environment and homelife are as fleas to dogs compared with the genes we inherit and the environment when we are in the womb. What we are when we are born is most of what we will be. Look what is happening with autism being so on the rise, for instance.
We can try, as I am sure that young woman's parents tried, to guide our little pathological liars. We can get them counseling, if we can afford it. But Science has yet to find the cure. Medications presently in use may help for now, but we need to put money into Research to get to the bottom of what is a PHYSICAL problem.