The air in the kitchen felt suddenly thin, as if the oxygen had been pulled out by the tension vibrating between us. Claire’s knuckles were white where she gripped the cream-colored envelope against her chest. Her chest rose and fell rapidly, betraying the calm front she was trying so desperately to project.

The ambient noise of the morning—the hum of the fridge, the distant patter of rain against the living room windows—suddenly felt deafeningly loud.

Abby’s eyes went wide, all her bravado evaporating in a single microsecond. She grabbed my arm with a grip like a vise, her nails digging through my jacket fabric.

"She's back," Abby mouthed, her voice a terrified squeak.

I didn't answer. I slowly slipped my hand down to my side, instinctively searching for something heavy, my eyes darting across the kitchen island. A heavy cast-iron skillet sat on the back burner. Perfect.

"Claire," I whispered, keeping my lips barely moving. "Take Abby, go out through the mudroom, and get to your car. Lock the doors."

"I'm not leaving you here," Claire whispered fiercely, shaking her head. She grabbed a thick ceramic rolling pin from the knife block beside the sink. Her knuckles were white, but there was no fear in her eyes—only a fierce, protective defiance that made my chest ache. "We're not running."

Footsteps approached the kitchen threshold.

Slow. Deliberate. Light as a feather.

A shadow fell across the kitchen doorway.

Then, a voice drifted in—smooth, melodic, and chillingly familiar.

"Mason? Are you finally back from your little trip? I brought your favorite pastries from the bakery downtown. I knew you'd be hungry."

Sarah stepped into the kitchen.

She looked immaculate, wearing a pristine beige trench coat over a silk dress, her blonde hair falling in perfect waves around her shoulders. In her hands, she held a white bakery box tied with a neat black ribbon.

Her smile was radiant as she rounded the corner—right up until she locked eyes with the three of us standing shoulder-to-shoulder in the center of the kitchen.

Sarah stopped dead. The smile vanished from her face as quickly as a blown-out candle.

Her gaze swept over Claire, holding a rolling pin like a weapon, then over Abby looking pale with horror, and finally landed on me, holding the cast-iron skillet.

"Well," Sarah said, her voice dropping its sweet facade, turning sharp and cold as winter steel. "It looks like the welcoming committee is already here."

"Sarah," I said, my voice dangerously low. "How do you have a code to my smart lock?"

Sarah let out a soft, mocking laugh, tossing her head back slightly. "Please, Mason. You really think an engineer builds a house with security systems I can't hack? I designed half the smart-home specs with you before you left for your little deployment. Did you really think you could just lock me out of your life?"

"You broke into my house," Claire stepped forward, her voice ringing with icy fury. "You’ve been sneaking in here for months while I was asleep upstairs. What is wrong with you?"

Sarah’s eyes snapped to Claire, narrowing into dangerous slits. "Ah. The housesitter. The little charity case Abby dragged in to keep the bed warm. Tell me, did you enjoy sleeping under the sheets I picked out for us? Did you like looking at my art on the walls?"

"Sarah, shut your mouth," Abby snapped, stepping up beside Claire. "You are completely unhinged. I'm calling the police right now."

Abby whipped out her phone and tapped the screen, raising it to her ear.

Sarah didn't even flinch. Instead, a slow, terrifying smile spread across her lips.

"Go ahead, Abby," Sarah said softly, tilting her head. "Call them. Tell them your brother’s ex-fiancée is trespassing. And while you're at it, explain to them why there's a safety deposit box registered under your name containing fifty thousand dollars in unmarked cash hidden in the basement rafters."

Abby’s phone slipped from her ear. Her face went entirely ghost-white.

"What did you just say?" I asked, turning my gaze slowly from Sarah to my sister.

Abby swallowed hard, her eyes darting frantically. "Mason... she's lying. She's completely insane—"

"Am I?" Sarah asked, stepping closer and dropping the bakery box onto the kitchen island with a heavy thud. She reached into her trench coat pocket and pulled out a small, encrypted flash drive, holding it up between two fingers. "Because I have the wire transfer receipts, Abby. And the security footage of you letting me into the house every single time... in exchange for a very generous cut."

The kitchen spun around me.

My sister. The person I trusted above all others.