I used to believe love could survive negligence. I told myself that every missed appointment, every broken promise, every moment Julian chose Sienna over me and our son was just a phase he'd outgrow. But when he ripped the only EpiPen out of my hands while our five-year-old suffocated on a ballroom floor—so he could run it to a woman who'd been "bitten by a bug"—something inside me finally died.

My son, Leo, has a zero-tolerance peanut allergy. While he fights for air on cold marble, my husband spends his time playing devoted rescuer to Sienna—the "fragile widow's daughter" he swears is just an old family friend. He steps over Leo's outstretched hand. He tells me to give our dying child mouth-to-mouth while he cradles her instead.

So I make a choice. I stop waiting for the ambulance.

I save my own son because no one else was coming. I call in every favor I have left, taking my child and walking away from the life I spent years building. And just when Julian thinks an apology and an expensive toy will fix what he broke, I uncover the truth behind his obsession.

Sienna Rhodes isn't a grieving widow. She's a calculating con artist with a criminal past—and the peanut oil in Leo's food was no accident.

Now the man who chose a stranger over his own son is about to learn exactly what it costs to lose the only people who ever truly loved him. And this time, I'm not the one who has to beg.