On Christmas Eve, my husband kicked me and our eight-year-old daughter out of his SUV to make room for his childhood sweetheart's child. "Reese, wake Ivy up. Lola needs her seat." I stared at Nolan. Outside, snow was falling across the highway rest stop. Our daughter was still asleep in the back, her cheek pressed against the booster seat. She had been talking about Christmas at the mountain cabin all week. Now her father wanted to leave her beside a highway in a snowstorm. "You want me to wake her up and leave her here?" "Your sister lives nearby. I'll call Tessa. She can pick you both up in thirty minutes." An hour earlier, we'd been driving toward the cabin when Maren called. Her rental car had broken down, and she was stranded with her seven-year-old daughter, Lola. Maren was Nolan's childhood sweetheart. She'd returned to town six months ago after her divorce. Since then, whenever she had a problem, Nolan was the first person she called. And he always answered. Tonight, he'd turned the SUV around before she'd even finished explaining. Now Maren stood beneath the awning with Lola, while my husband decided which family would get to spend Christmas with him. "I'll stay here with Maren," I said. "Take both girls and your parents somewhere warm. You can come back for us." He frowned."Reese, don't start." "I'm offering you a solution." "Enough." His voice carried across the parking lot. Ivy stirred in her sleep. Nolan lowered his voice. "Maren can't drive in this weather. Lola needs her mother. Stop making everything difficult." "And Ivy needs her father." "She has you." I looked at him. This was the man who had spent an entire afternoon installing Ivy's booster seat because he didn't trust the instructions. Last winter, when cold air triggered her asthma, he'd carried her all the way home, refusing to let anyone else hold her. He'd sat beside her bed until morning. Now he was asking me to leave her in the cold. I glanced at Ivy. Surely he'd change his mind once he looked at her. Maren approached with her pink suitcase. "Reese, I'm so sorry. I never wanted to cause trouble." "Then stay with me. Nolan can take both girls." Maren tightened her grip on Lola's hand. "I can't leave her. She's already frightened." Lola pressed closer to her mother. I understood that. What I couldn't understand was why protecting Lola meant sacrificing Ivy. Elaine rolled down her window. "For heaven's sake, Reese. Maren and Lola have been freezing out here. Show some compassion." I stared at my mother-in-law. Apparently, it was unacceptable to leave Maren here, even with another adult beside her. But leaving an eight-year-old child was perfectly reasonable. Howard sat beside Elaine, staring straight ahead. He didn't say a word. Nolan opened Ivy's door. Cold air rushed into the back seat. I stepped between him and our daughter. " If you leave us here, don't expect me to pretend this was okay. " "Stop acting like I'm abandoning her." He rubbed his forehead. "We'll talk when you've calmed down." For a moment, neither of us moved. Then Nolan reached past me and pressed the release on Ivy's seat belt. The click woke her. "Daddy?"She rubbed her eyes and looked up at him."Are we at the cabin?" "Not yet, sweetheart. Lola needs your seat, so you and Mommy are going to wait here for Aunt Tessa." Ivy looked past him at the snow. "But it's Christmas Eve. Can Lola wait with her mommy instead?" Nolan's expression changed. "Ivy. Don't argue." Her mouth closed. She'd spent the whole week choosing her Christmas dress. Three days ago, she'd asked Nolan whether he would lift her up to put the gold star on the tree. He'd promised he would. Now she was staring at him as if she couldn't understand what she'd done wrong. I caught his wrist. "Please, Nolan. She's your daughter." He paused. For one foolish second, I thought I'd reached him. Then he carefully removed my fingers from his sleeve. "Of course she's my daughter. That's why I know she'll be fine with you." He lifted Ivy onto the pavement. I pulled her coat around her while he returned to the SUV. Maren loaded her suitcase into the back. Lola climbed onto Ivy's booster. Ivy watched the little girl's pink boots settle where hers had been. Then Maren slipped into my front passenger seat. For seven Christmases, I'd sat beside Nolan on our way to that cabin. Ivy would sing along to Christmas music from the back, and Nolan would reach across the console to squeeze my hand. Now another woman sat beside him. And her daughter sat where mine belonged. Nolan shut the door. Ivy stood against my side, watching him. "Daddy, will you come back for us?" He brushed snow from her hat. "Aunt Tessa will be here soon, sweetheart. You'll be fine with Mommy." Then he got in. The SUV disappeared into the snow. I took her inside and found a bench near the heater. Ten minutes passed. Then twenty. At five, an employee began switching off the lights. "Sorry, ma'am. We're closing. Storm's getting worse." Nolan had been gone for thirty minutes. No message from Nolan. No call from Tessa. I took out my phone, but before I could call her, Ivy coughed. I spun around. She was sitting forward on the bench, one hand pressed against her chest. "Ivy?" She tried to answer. A thin whistle came out instead. Every part of me went cold. Ivy had cold-air asthma. Most days, it was easy to control, but winter weather could trigger an attack. I tore open my purse, my hands shaking so violently I spilled my wallet and keys onto the dirty linoleum. Empty. I searched again, even though the bag was too small to hide it. Then I remembered. Ivy’s emergency backpack—the one containing her albuterol inhaler and spacer—was still hanging from the back of Nolan’s driver’s seat. And Nolan had driven away with both. I grabbed my phone as Ivy struggled for another breath. My daughter's medicine was in my husband's car. And she could barely breathe.