When Tyler and I started our business, we were complete rookies. Yet, somehow, we had built it into what it was today, facing countless ups and downs along the way. I wasn't naive enough to believe Rachel was just having an affair—there had to be more to it.

Sophia had a beauty appointment, so she left early, promising to pick me up later for dinner. I agreed.

After she left, I sat back and carefully thought through all the possibilities. Suddenly, a wave of ...