Soon, I was spending hours in the parallel universe of cyberspace, often through wonderfully wide-awake nights, uninhibited in a way I never could be in reality.
I told no one, immersed and isolated in my secret life. In moments of fleeting clarity, I wanted to understand what was happening to me. Was it just my marriage problems, or was there something deeper causing me to behave that way?
He was by far the best of the bunch, a kind and generous man, but someone who could also be selfish and unfeeling.
We had agreed, early on in our relationship, that we wouldn't have children. Several friends, however, were convinced that our lack of children created a vacuum.
I was fortunate enough to get another chance to do so, and I'm working at it now. Turned On By Lucy Dent (Doubleday, rrp £14.99) is available to order from Telegraph Books at £12.99 £1.35 p&p.
Call 08 or visit Telegraph Books The Big Short, the film adaptation of Michael Lewis' book of the same name about the causes of the financial crisis, opens in UK cinemas this weekend.
As I have come to learn, most of those who grow up in a dysfunctional relationship are condemned to seek them out forevermore. In adulthood, I had become a rather complicated girlfriend, each relationship beginning well, but then growing fractured and ending badly.
I am bound to say, though, that I wasn't solely culpable. I ended up marrying one of these complicated boyfriends.
Taking my online affair offline was my big mistake, a transgression too far.
What drew me to the online world was the maintenance of fantasy.
And then it was finished: our nest, our empty nest. I became addicted to the attention and craved contact with the men I thought I had come to know. But I found out it wasn't as easy as I had first thought. I quit decisively at first, then slipped up, then quit again, craving some kind of patch.
My husband worked hard at his job and, to alleviate its accompanying pressures, developed his obsession with horseracing, gambling and drinking. These conversations quickly developed into cyber-sex, each message becoming more adventurous and racy and allowing me to live out fantasies I would never contemplate doing in the real world. My husband and I became strangers, our lives by now distinct entities. I told myself that what I was doing was essentially harmless.
I met all sorts of people, from all over the world, older and younger, and each seemingly as desperate for a true connection as I. Should I be blaming my mother, or my – mostly absent – father for feeling that something was eternally missing? I was born to a woman that didn't much want children, and who fell foul to postnatal depression a good couple of decades before the term was even coined.