She lied about the embezzlement.
She lied about the loan and how they lost their house.
She lied about the seriousness of Tim's illness: according to his consultants he had mild CBS symptoms, diagnosed in 2015, two years after the 'walk'.
I believe she's lied about the walk, and they did bits of it but not all of it.
So yes, we're picking apart her books because they appear to be based on a fabricated history.
Their nephew says they are pathological liars, and I believe him.