Asking for a friend - seriously!
Friend's DH believes she has been unfaithful and he says the only way he will trust her again is if she takes a lie detector.
I've a few questions - is it even accurate? Would you agree to do such a thing under the circumstances? Who is to say the issue stops there - he obv doesn't trust her so what's to stop this happening again?
It's quite unusual behaviour to be so distrusting and paranoid and I'm concerned he's unwell.