Part 4 is finally here, and I need you to sit down before you read a single word further.

Because bringing Grace home turned out to be the easy part.

Keeping two little hearts from breaking under the same roof, that was the war nobody warned us about.

The first night went better than Clara had any right to hope.

Grace fell asleep in the car clutching Buttons, her worn gray rabbit, her small hand resting on Noah’s arm across the gap between their booster seats.

Ethan carried her inside without waking her, and Clara stood in the doorway of the nursery they had decorated in a frantic, joyful blur, watching her daughter breathe.

Two years she had ached for this.

Two years she had cleaned other people’s floors and watched her son from doorways and wept into a gray uniform.

And now both her children slept under the same roof, and the storm was finally, finally over.

That was what she told herself.

The second night told her something different.

It began around midnight, the way the worst things always seem to.

Clara woke to a sound she did not recognize at first, a thin, rising wail coming from the nursery down the hall.

She was out of bed before she was fully awake, her bare feet slapping the cold marble, her heart already pounding.

Grace was sitting up in the middle of the enormous bed, her dark curls stuck to her wet cheeks, screaming.

“Mama! MAMA!”

Clara’s whole body lit up with joy and terror at once.

She rushed to the bedside and reached out.

“I’m here, baby. Mama’s right here.”

But Grace shrank back against the headboard, her little face twisting in confusion and fear.

“No,” the child sobbed. “Not you. I want Mama Margaret. I want to go HOME.”

The words hit Clara like a hand across the face.

She froze with her arms still half-extended, the joy draining out of her so fast it left her dizzy.

“Baby,” she whispered. “You are home. This is your home now. I’m your mama too.”

“You’re a STRANGER!” Grace shrieked, and she hurled Buttons across the bed and pressed her hands over her own ears. “Go away! I want my real mama!”

Clara sank down onto the edge of the bed and could not breathe.

She had imagined every version of this reunion except this one.

She had imagined Grace running into her arms. She had imagined slow, shy smiles. She had even imagined silence.

She had never once imagined her own daughter screaming at her to leave.

From the doorway came a small, trembling voice.

“Don’t yell at Mommy.”

Noah stood there in his pajamas, his hair sticking up, his eyes wide and shining in the dim light.

“She came back for us,” he said, his chin wobbling. “You’re not supposed to yell at her. She came back.”

Grace stopped screaming.

She stared at her brother across the big bed, her chest still heaving, her face wet and bewildered.

And Clara, kneeling on the floor between her two children, finally let the sob she had been holding tear its way out of her chest.

Ethan found them all there a moment later.

He scooped Noah up, and he sat down on the floor beside his wife, and the four of them stayed in that dim nursery until the screaming faded into hiccups and the hiccups faded into the heavy, uneven breathing of an exhausted child crying herself to sleep.

But Grace did not reach for Clara.

She reached, in the end, for Buttons.

For the one piece of the only home she had ever known.

The next morning, Clara sat at the breakfast table with cold coffee in her hands and a question she was terrified to say out loud.

Ethan said it for her.

“You’re wondering if we made a mistake,” he said quietly. “If we should have left her with Margaret.”

Clara stared into her cup.

“I’m her mother,” she said. “I carried her. And she looks at me like I’m a kidnapper. Like I’m the one who stole her.”

Her voice cracked.

“Maybe to her, I am.”

Ethan reached across the table and took her hand, the way he always did.

“Two years ago, Noah didn’t know your face either,” he said. “But his heart knew you. It just took time for the rest of him to catch up.”

Clara wanted to believe that.

But Noah had been a baby when she vanished, too young to grieve, too young to bond with anyone else.

Grace had spent every day of her short life loving another woman.

You cannot ask a two-year-old to simply unlove the only mother she has ever known.

And Clara would not have wanted to, even if she could.

That was the cruelest knot of it all.