So, how messed up is that? needless to say, Im not too happy about it. She was robbed of 50k in jewelry while out of town, left the alarm off and a door unlocked by accident, so her 2 sons and my wife are the top suspects, because she is "convinced it is an inside job." Reluctantly, Ive agreed to a lie detector, though Im pretty suspicious of their effectiveness. I don't feel like Ill be too nervous, Im telling the truth, but there is a lot at stake. My relationship with her is going to be pretty rocky after this, who wouldn't be extremely offended? Im going to be really angry if I fail the test, because then Ill have to defend myself the rest of my life. 

What are the chances I self incriminate myself if Im innocent? Am I just at the whim of the test taker? Ive found so many experts in the field of psychology who highly suggest avoiding these 'tests' if you can, so I really don't want to. But my crazy mom says Ill be assumed guilty if I don't take the test, which is pretty messed up.

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Aunty has the feeling that it has been rocky for a long time.

You should tell your mother that you will agree to a polygraph exam to prove you are innocent only if she will agree to a DNA test to prove she is your mother.

I also think that anyone who is asked to pass a polygraph exam to prove his innocence should consider two inescapable truths:

1. The polygraph lie detector is junk science and is no better than a coin toss.  It is poisonous to true justice because lazy police and vicious prosecutors can pretend to believe in it.

2. Anyone who makes a accusation based on flimsy or absent evidence is sure to have a heavy emotional investment in the guilt of the accused.  He (or she) will believe a lie detector test only if it indicates guilt, and will find an excuse to toss it out if it indicates innocence.