I dumped lover, now I fear she'll blow up marriage

I'm a man in my 30s and married with an 18-month-old son. A few months ago, I started talking to a woman I met at the station on my commute into work. We began sitting together on the train in the mornings, which made the journey more fun and interesting.

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However, regrettably, it turned into a short-lived affair and we slept together several times. I still feel guilty when I think of the lies I told my wife about having to work late.

Long story short, I buckled under the stress and guilt, and ended the affair, as nicely as I could. I thought that would be it, but this woman is bombarding me with angry messages, claiming I used her and then dumped her.