I called my husband 31 times from the ER as his mother lay dying. On the 31st ring, his mistress answered. “He’s in the shower. We’re in Maui. Stop calling, old wife,” she laughed over the sound of ocean waves. He had fabricated a business trip so he could abandon us. My dying mother-in-law heard every cruel word. Fury blazed in her eyes. With the last breath she had left, she slipped a hidden silver key into my hand and silently mouthed two words: “Destroy him.” Then the heart monitor flatlined

She squeezed my hand with a desperate strength. Beneath the plastic oxygen mask, her pale lips moved. No sound escaped, but after studying her face every day for twenty years, I read the words perfectly: Destroy him.

Then, mustering the absolute last ounce of her fading life force, Margaret pressed a jagged piece of metal into my palm. It was a tiny, silver lockbox key she had kept pinned to her undergarments for years, a key she refused to let Mark even look at. As my eyes widened in shock, her chest fell tight, and the heart monitor flatlined into an endless, droning hum.

Now, standing in the twilight of my empty living room, I powered my smartphone down. The screen went black, entirely severing my digital tether to my husband. I grabbed the handle of my solitary suitcase and walked out the front door, dropping my house key into the mailbox slot.