"So you slept with him?" Rachel asked in a loud, strange voice. Her cheeks flushed pink-a sure sign that she was angry-but I plowed on, divulging full details, telling her how our affair had begun, how we tried to stop but couldn't overcome the crazy pull toward each other. Then I took a deep breath and told her that I was pregnant with Marcus's baby and that we planned on getting married. I braced myself for a few tears, but Rachel remained composed. She asked a few questions, which I answered honestly. Then I thanked her for not hating me, feeling incredibly relieved that despite the upheaval in my life, I still had my anchor, my best friend.

"Yeah… I don't hate you," Rachel said, sweeping a strand of hair behind her ear.

"I hope Dex takes it as well. At least as far as Marcus goes. He's going to hate him for a while. But Dex is rational. Nobody did this on purpose to hurt him. It just happened."

And then, just as I was about to ask her if she would still be my maid of honor when I married Marcus, my whole world collapsed around me. I knew that nothing would ever be the same again, nor had things ever been as I thought they were. That was the moment I saw Dexter's watch on my best friend's nightstand. An unmistakable vintage Rolex.

"Why is Dexter's watch on your nightstand?" I asked, silently praying that she would offer a logical and benign explanation.

But instead, she shrugged and stammered that she didn't know. Then she said that it was actually her watch, that she had one just like his. Which was not plausible because I had searched for months to find that watch and then bought a new crocodile band for it, making it a true original. Besides, even had it been a predictable, spanking-new Rolex Oyster Perpetual, her voice was shaking, her face even paler than usual. Rachel can do many things well, but lying isn't one of them. So I knew. I knew that my best friend in the world had committed an unspeakable act of betrayal.