He had sat in an office with me, holding my hand and talking about our financial future, and then driven three blocks away to sign legal documents to house his pregnant fiancée. After I washed my face in her sink, we walked back out to the living room where the FedEx box was waiting.

We both just stared at it. “Do you know what it is?” I asked her. She shook her head, tears streaming silently down her face. “He said he ordered a surprise for the nursery. He told me not to look at the shipping info.” I found a pair of scissors on her counter and cut through the thick packing tape.

We pulled back the cardboard flaps together. Inside was a high-end, beautiful, solid wood baby crib. It was easily a thousand-dollar piece of furniture. But that wasn’t the final blow. As I was folding the cardboard flaps back, a small packing slip slipped out of the plastic pouch on the side of the box and fluttered to the floor.

I picked it up. The “Ship To” section had her name, his last name, and her address. But the “Bill To” section—the name of the person who actually paid for this expensive piece of nursery furniture with their credit card—was an entirely different name. It was Margaret.

My mother-in-law. James hadn’t just been lying to me. His mother knew. She knew about the second house, she knew about the fake divorce story, and she knew about the baby. She had sat at my dining room table for Thanksgiving, eating the turkey I cooked, asking me when James and I were going to finally start trying for grandchildren, knowing full well she was already buying nursery furniture for his pregnant fiancée three blocks away.

I didn’t scream. I didn’t cry. I think my brain just completely detached from my body to protect me from the sheer weight of the betrayal.

I calmly asked Sarah if I could take a photo of the lease, the ring, and the packing slip.

She nodded, still sobbing on her sofa. I walked out of her house, leaving the crib behind, and walked the three blocks back to my home. I packed a single suitcase. I took photos of all our joint financial documents. I called a lawyer, and then I called my sister to come pick me up.

I haven’t spoken to James yet. I know his phone has been blowing up because Sarah called him the second I left. My mother-in-law has left me fourteen voicemails, all variations of her crying and saying she can explain. There is nothing to explain. My husband didn’t just have an affair.

He built an entire parallel universe, funded it with our shared income, and got his family to act as the supporting cast. And he was arrogant enough to do it on the exact same street, betting his entire life on the fact that two women separated by three blocks would never cross paths.

He lost the bet. All because of a tired FedEx driver who couldn’t be bothered to check a house number.