Identical

They learned early that mirrors lie.

As children, everyone insisted that Anna and Mara were identical - same pale freckle under the left eye, same narrow wrists, same way of tilting their heads when listening. But Anna knew the truth in her bones: Mara breathed faster, laughed louder, wanted things harder. Anna was the quieter echo, the one who waited a half-second before speaking, as if checking whether the thought belonged to her or her sister.

At twenty-five, the differences had finally become undeniable. Cancer had made Mara's body honest in a way mirrors never were. Her hair thinned, her skin dulled, her movements slowed, and yet her presence filled rooms more than ever. Anna, healthy and intact, felt strangely translucent beside her, like the surviving half of a photograph that had been torn down the middle.

They shared an apartment again after the diagnosis, reverting to a childhood arrangement neither had named but both recognized. Anna learned the new rituals: counting pills, measuring pain in careful questions, pretending not to watch Mara's chest rise at night. She became fluent in the language of almost - almost hungry, almost tired, almost okay. Almost was the most dangerous word; it meant hope was trying to sneak back in.

Sometimes Mara would reach out and press her palm to Anna's chest, right over her heart. "Just checking," she'd say lightly.

"Checking what?"

"That it's still beating for both of us."

Anna never laughed at that. She didn't trust her voice.

What they never spoke about - what sat between them like a third twin - was the unfair arithmetic of it all. They had begun as one cell, split evenly, and yet fate had chosen only one body to betray itself. Anna carried guilt the way others carried handbags, always within reach, always too heavy. She felt it when she ate without nausea, when she ran without breathlessness, when she imagined a future that Mara could no longer claim.

Mara sensed this, of course. Twins always knew. One evening, as rain stitched the city together outside their window, Mara said, "You don't have to die with me."

"I'm not," Anna said quickly, then hated herself for how relieved she sounded.

"That's not what I mean." Mara turned her head, studying Anna's face as if committing it to memory. "You think surviving is a kind of theft."

Anna's eyes burned. "Isn't it?"

"No," Mara said. "It's a continuation. We didn't come from the same beginning so we could have the same ending."

The night Mara was admitted for the last time, Anna climbed into the narrow hospital bed beside her. They fit the way they always had, limbs folding together instinctively. Mara's voice was thin now, but steady.

"Promise me something," she whispered.

"Anything."

"Be whole," Mara said. "Not half of me. Not the part that lived. Just be whole."

Anna nodded into her sister's shoulder, memorizing the shape of her, the weight. When the morning came and Mara was gone, Anna felt the silence cleave her cleanly in two - and then, slowly, she stood.

For the first time in her life, she walked forward alone, carrying not an absence, but a doubling: her own heartbeat, and Mara's, echoing on inside her, insistent and alive.