Ava Reed, aged 23, a psychology PhD student. She fell into it because she had to save one.

At 15, her stepbrother Liam had a near-fatal allergic reaction to sugar. One bite of cake, and his throat closed in under 3 minutes. The doctors said “avoidance is management.” The doctors said “there’s no cure.”

Ava didn’t accept that.

So she dropped everything else, changed her major, and spent the next 6 years studying behavioral desensitization, anxiety, and neuroplasticity. Every paper she wrote, every experiment she ran, had one person in mind: Liam.

On the outside, she looks calm, organized, and a little distant. She’s the girl who always carries an EpiPen, checks food labels twice, and remembers everyone’s allergies better than their birthdays.

On the inside, she’s terrified.

Terrified that if Liam ever gets better, she’ll lose the one thing that’s given her life purpose. Terrified that the line between “sister” and “something more” is thinner than she wants to admit.

Her biggest fear isn’t losing Liam to his allergy.

It’s losing him to a normal life she’s not in.

Now she was 23, a PhD student at the campus clinic, and her thesis was titled “Behavioral Desensitization in Adult Food Allergy Patients: A Feasibility Study.”

Her classmates called it ambitious. Her parents called it “another excuse to avoid marriage.”

Her dad had been calling about marriage a lot lately.

Dad: Ava, don’t make plans Saturday. Mr.

Jones son is back from the states. He’s a doctor. Nice family. You’ll like him.

Ava: Dad, I have a lab.

Dad: You can skip one lab. Marriage is forever, Ava.

Ava deleted the reply she’d typed: I don’t want forever with a stranger.

She typed back: Okay.

Lying was easier than fighting.

She shoved her phone in her bag and headed for the Fine Arts building. Liam would be waiting. He always waited.

Liam’s studio was on the 3rd floor, door propped open with a paint tube.

“Art doesn’t follow rules,” he’d told campus security when they threatened to lock him out. “Neither do I.”

He was on the floor now, surrounded by sketchbooks, a cigarette between his fingers even though he didn’t smoke. He was drawing. Always drawing.

“Don’t tell me you skipped lecture again,” Ava said, dropping her bag.

Liam didn’t look up. “Don’t tell me you agreed to a blind date again.”

Ava froze. “How do you”

“Your dad called my mom. Your dad calls mine because he knows I’ll tell you.” He set the pencil down and finally looked up. “You’re not going.”

“I’m twenty-three, Liam. I can go on a date if I want.”

“Can you?” He stood, towering over her. “What if I eat that chocolate cake in the fridge?”

That shut her up.

It was unfair. It was manipulative. It worked every time.

Ava sighed and sat on the edge of his drafting table. “You don’t even like chocolate.”

“I like keeping you here more.”

The words hung between them, too honest and too dangerous.

Ava stood up too fast. “I brought your meds. Check your phone. I set a reminder for 6 PM. Don’t skip it.”

Liam watched her. “You’re late.”

“What?”

“You’re late. You usually get here at 5.” He tilted his head. “Did you almost go?”

Ava didn’t answer. The guilt on her face said enough.

Liam stepped closer. “Ava. If you go on that date, I’m not promising I won’t do something stupid.”

“Like what? Eat sugar to spite me?”

“Like tell them the truth.”

Ava’s stomach dropped. “What truth?”

“That the only reason you’re still single is because you’re scared of what happens if I get better.”

The room went quiet.

Ava’s hands clenched. “Don’t say that.”

“Why not? It’s true.” His voice dropped lower. “You spent 8 years studying psychology for me. You skipped parties, skipped dates, skipped a life. And if I ever actually get better… what are you left with?”

“I’m your sister,” she said quietly. “That’s what I am.”

Liam’s jaw tightened. “Step-sister.”

“Does it matter?”

“It does to me.”

Ava grabbed her bag. “I’m leaving.”

“Go on the date, then,” Liam said behind her. “See if he makes you feel the way I do.”

Ava didn’t turn around. “You don’t know how I feel.”

“I know you carry my EpiPen like it’s a wedding ring.”

That stopped her.

She walked out before she could say something she’d regret.

Ava didn’t go on the date.

She told her father she had a migraine. She sat in her apartment at 8 PM, staring at untouched takeout, her phone face-down.

Her apartment was quiet. Too quiet. No sound of pencils scratching paper. No sound of Liam muttering curses when a line went wrong.

At 9:14 PM, her door opened with the key she’d given him years ago.

“You didn’t go,” Liam said, stepping inside. He was holding a small box.

Ava didn’t look up. “You knew I wouldn’t.”

“I wanted to be sure.” He set the box on her coffee table. “Happy birthday.”

Ava blinked. It wasn’t her birthday for another three weeks.

“What is this?”

“Open it.”

Inside was a drawing. Her. Age 15, sitting on the hospital floor, holding his hand while he slept. He’d captured the exact moment she’d promised, I’ll fix this. I’ll fix you.

Ava’s throat tightened. “Liam”

“I’m tired of waiting,” he said. “Every year on your birthday, I tell you I love you. And every year, you laugh and say I’m confused.”

“I say that because you are confused,” Ava whispered. “We’re family.”

“Then explain why I can’t stop thinking about kissing you.”

Ava stood up so fast her chair fell back. “Stop.”

“No.” Liam stepped forward. “I’m tired of pretending. I’m tired of hiding behind the allergy, behind the art, behind ‘I’m just your annoying stepbrother.’”

“You’re not annoying.”

“Then say it back.”

Ava shook her head. “I can’t.”

“Why?”

“Because if I say it back and you’re wrong, we lose everything.” She swallowed hard. “And if you’re right, and you ever eat candy and die, it’ll be my fault.”

Liam was quiet for a long moment. Then he reached into his pocket and pulled out a wrapped caramel.

Ava’s breath caught. “Put that away. Liam, don’t”

“What if I told you I’ve been seeing a specialist?” he said quietly. “What if I told you there’s a 12% chance I could tolerate trace amounts now?”

“That’s not enough. 12% isn’t enough.”

“It’s more than zero.” He held the candy out to her. “Ava. If I eat this, and I’m okay, will you believe me?”

Ava stared at the caramel like it was a bomb.

“Don’t do this.”

“Then tell me the truth.”

Her phone buzzed. Dad,

He’s waiting at the restaurant. Ava, please don’t embarrass me.

Ava looked from the phone to the candy to Liam’s face.

Her hands were shaking.

“Liam, I ”

The doorbell rang.

Both of them froze.

No one came to Ava’s apartment at 9 PM.

Liam pocketed the candy, his expression darkening by. “Who’s that?”

Ava didn’t know. But she had a feeling her father’s definition of “don’t make plans” didn’t include “don’t send someone over.”

She walked to the door, her heart pounding.

When she opened it, she saw a man in a suit holding flowers.

“Miss Reed?” he said. “I’m Dr. Michael Jones. I believe we were supposed to meet tonight.”

Behind her, Liam let out a low, dangerous laugh.

Ava turned around.

Liam was already unwrapping the caramel.