Caleb alternated between the vividly colored fish tank and the twin boys reading a faded book in the pediatric clinic waiting area. They laughed, but his anxieties tightened with each passing second.

Caleb stood up as Dr. Madeline Chu entered the doorway, expressionless.

“Mr. Dawson? Can I talk privately with you?

The heart skipped. Mason, his younger kid, was diagnosed with anemia last week, and the doctor advised further tests. Logan, his other kid, was OK.

“Is something wrong?” He questioned, standing, hands sweating.

Dr. Chu pointed to her office. “We need to discuss it separately from the boys.”

Apprehension gripped Caleb as he followed her.

She sat behind the desk after motioning for him to sit. Both you and your wife, Avery, have blood type B, right?

“Yes,” Caleb said softly.

Chu folded her hands. Logan and Mason have type A blood. That’s unusual but not unheard of. Mason’s anemia was severe, so we did a more in-depth investigation as part of a larger panel.

Leaning forward, Caleb “What are you saying?”

Dr. Chu shoved a file at him from her desk. I ordered a DNA test to rule out hereditary concerns. I regret for not asking for your permission initially, but I thought it was necessary for medical accuracy.”

Caleb shook as he opened the folder.

A top page said that DNA results showed no paternal genetic match between the children and Caleb Dawson.

Throat closed.

Dr. Chu proceeded softly but forcefully. There’s more. The DNA shows that both boys share a father. That father is not you. Someone in your close family. They’re your half-brothers genetically.”

The words spun the room.

Caleb stared shocked, the paper falling from his hands.

Later that day, Caleb arrived home as the twins ran to the living room.

Grandpa arrived! Mason called happy.

Walter, his father, spoke from the kitchen. “My favorite duo!”

Clenched jaw, Caleb.

Avery looked up from the stove. “You’re home early,” she replied cheerfully but curiously.

“We must talk. “All of us,” he stated flatly.

The twins faced him. Are we in trouble? Logan inquired uncertainly.

“No, boys,” Caleb said, smiling quietly. “Why not grab your overnight bags? Do you remember tonight’s overnight with Jonah?

Caleb turned to face his wife and father after hearing the door shut as they ran upstairs.

Want to explain how our boys are my half-brothers? He spoke deadly calmly.

Avery whitened. “Caleb…”

She was chopped off. Lying is wrong. I saw the test results.”

Walter advanced. “Son, listen—”

“Don’t call me that,” Caleb snarled, staring at his father.

Voice broke, Avery. “This wasn’t supposed to happen.”

He said, “How did it happen at all?”

Avery gulped hard, eyes brimming. “Thirteen years ago… I visited Monterey with the girls. You remember?

He nodded slowly.

“I met someone at the hotel bar. The elder man was nice. Only Walter was known to me. I assumed a fling. A pointless night. I never anticipated seeing him again.”

Caleb angled toward his father. “You knew?”

Walter looked serious. I didn’t recognize her—at first. Not until you told us she was pregnant with twins. Even then, I considered it may not be mine. Perhaps that was a coincidence.”

Shaking shoulders, Avery. “I didn’t know he was your father until I entered your family’s front door.”

Fearful, Caleb glanced at them. “You both knew. You remained silent. You allowed me to love and nurture them as mine.”

“I didn’t know how to tell you,” Avery muttered.

“I didn’t want to destroy your life,” Walter said.

Bitterly, Caleb laughed. “Too late.”

Head in hands, he sunk into the armchair. All memories of bedtime tales, first steps, and scratched knees seemed false. Life founded on treachery.

He hoarsely muttered, “You could have told me at any time.” But you didn’t. You saw me love them like a father despite not being one.”

“You are their father,” Avery whispered. “Every way that matters.”

“Not by blood,” he muttered.

In the corridor, two little voices spoke.

“Daddy?” Mason shakily spoke.

Both lads stood with wide eyes as Caleb glanced up.

“Are you mad at Grandpa?” Logan asks. “Did we mess up?”

Caleb stood up forcibly. His voice was thick as he squatted. “You two did nothing wrong. You’re my boys. That never changes. My greatest affection is you.”

“But… Grandpa is our dad too?” Mason asked perplexed.

Caleb choked. That’s tricky. But don’t worry about it now, okay?

The lads nodded slowly. Caleb kissed their heads.

He rose, turned to his betrayer(s), and said, “I can’t live under the same roof as either of you.”

Shattered trust weighed him down as he packed a suitcase and left the front door.