'How I found out my husband had married another woman'

Yve Gibney, an NHS nurse from Merseyside, had been happily married for 17 years when her husband began behaving strangely. Here she explains how she turned detective - and made the awful discovery that he had a second life.

We met in Lagos in Nigeria in 1995 - it was a Friday night at a social club, around a pool table. I'd gone out to work as a nursing officer and he'd gone out to work for a construction company.