My first husband was very abusive. After a few years I began seeing another guy. My marriage broke up, and I was alone for a few years. Then I met my current husband.  We've been married for several years and have children.  It's been a good marriage, but my husband knows about my past, and lately he's been bringing it up more and more, maybe because my job requires me to fly around the country.  I've seen former boyfriends socially on a few rare occasions, but I've always been completely faithful to my husband.  It saddens me deeply that he mistrusts me so much.  I love him and would never want to cause the breakup of our happy family.  Lately he's been suggesting that I take a lie detector test to prove my fidelity.  I'm appalled by the suggestion and by the fact that he would even ask me to do such a thing.  But I told him I'd consider it if that would give him peace of mind.  Since then I've read ads by some polygraphers who make it sound as if the test is very reliable and the honesty they bring builds good marriages.  Of course, they don't want to mention all of the marriages they end.  I always understood that such ties really are NOT reliable.  I'd hate to tell the truth, only to have the tester tell my husband that I'm lying.  What do you recommend I do?