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My Dad Broke My Mom’s Heart When He Cheated & Had a Baby with His Mistress — Now He Demands I Use the Inheritance Mom Left Me for My Half-Sister’s Treatment

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I Chose My Late Mother’s Legacy Over My Father’s Guilt – And I Don’t Regret It

I used to believe we were the perfect family.

Every evening at 6 p.m., Dad came home from work like clockwork. We’d sit down for dinner together, and he’d tell us silly stories from his day. Mom would laugh at his terrible jokes, and I’d roll my eyes with a grin and say, “You really need new material, Dad.”

For 25 years, that was my world. Safe. Familiar. Whole.

But one Tuesday morning shattered everything.

“Julie, honey, sit down,” Mom said softly. Her eyes were red, and her voice trembled.

Dad wasn’t at the table. That already felt wrong.

“What’s wrong?” I asked. My stomach twisted as fear crept in.

She reached across the table and held my hand. Then she whispered, “Your father’s been seeing someone else. For eight years. And… he has a daughter with her.”

Everything froze. “What?”

“Her name is Sandra. And the little girl… her name is Mya. She’s seven.”

Seven. I did the math. That meant he started cheating when I was eighteen—when I was still living at home, bringing him coffee, celebrating birthdays, going to college and coming home for breaks. All those “late nights” at work and “business trips”… lies. All of them.

“How did you find out?” I asked.

“He told me,” she said. “Said he couldn’t live with the guilt anymore.”

I didn’t know whether to scream, cry, or throw something. Mom had kept it together somehow. Me? I was falling apart inside.

“I’m filing for divorce,” she said, with sudden strength in her voice. “His mother insisted on a prenup when we married, and thank God. It protects everything I brought into this family.”

And just like that, our family broke in two.

Dad moved out quickly. He didn’t fight over money, maybe because of guilt. Maybe because he just wanted to be free.

Mom, though? She was a warrior. Even through the pain, she never said a bad word about him to me.

“This is between your father and me,” she told me. “You choose the relationship you want with him. You’re an adult now.”

But I couldn’t see him the same. Every time I looked at him, I remembered Mom crying alone. I saw Sandra’s face in my mind, and the little girl I’d never met living a secret life while our family fell apart.

I tried meeting Dad for coffee sometimes. We’d talk, but it was always awkward.

“I know you’re angry,” he said once. “But I hope one day you’ll understand.”

“Understand what, Dad? That you lied to us for eight years?”

He had no answer.

Eventually, I forgave him. Not because he deserved it, but because I needed peace. But I never forgot. And I never welcomed Sandra or Mya into my life. That part of his world wasn’t mine.

Mom put everything into her consulting business after the divorce. She made it thrive. Watching her rebuild her life inspired me.

Dad, on the other hand, struggled. Supporting two households wasn’t easy.

Then everything changed again.

It started with Mom feeling tired. I told her to rest, take vitamins. We thought it was stress.

It wasn’t.

It was cancer.

The doctors were clear: it was aggressive, and there wasn’t much they could do.

Three months later, I held her hand as she slipped away.

She left me everything—her home, her business, her savings. All of it.

“You stood by me,” she whispered during her final days. “Promise me you’ll use this wisely.”

I did promise. And I meant it with all my heart.

Running her company was hard, but I learned. I paid off my student loans, fixed up the house, even took my first real vacation.

Then, out of the blue, Dad called.

“Julie, can we meet for coffee?” His voice was shaky.

“What’s going on?” I asked, not ready to open old wounds.

“It’s about Mya. She’s very sick.”

I agreed to meet. We sat in the same coffee shop we used to after the divorce.

He looked older. Tired. His hands trembled as he stirred his cup.

“Mya’s been in the hospital for three months,” he said. “She has a rare blood disorder. The treatment costs $60,000. Insurance won’t cover all of it.”

“I’m sorry to hear that,” I said honestly. “That must be hard.”

“We’ve borrowed money, maxed out credit cards. Sandra’s parents helped, but it’s not enough.”

I could feel where this was going.

“She’s your half-sister, Julie. Whether you accept it or not.”

“I’ve never even met her,” I replied.

“That was your choice,” he snapped. “But she’s innocent. She didn’t ask for any of this.”

He wasn’t wrong. But still… asking me to use Mom’s money?

“I can’t, Dad,” I said, trying to stay calm. “That money is from Mom. It’s not my responsibility. Mya has two parents.”

“I’m her father. And you’re her sister. Family helps family.”

I stared at him. “Were you thinking about family when you cheated on Mom?”

He went silent.

Then he leaned forward, eyes full of desperation. “Please. Can you live with yourself if she dies? Because I’ll make sure you know it was your choice.”

A chill ran down my spine. That felt like a threat.

“I need time to think,” I told him, though I already knew the answer.

The next morning, he called again.

“I need your answer,” he said.

“Dad, this isn’t a simple yes or no—”

“Yes or no, Julie. Will you help your sister or not?”

The word “sister” sounded like a trick. He was using guilt.

“No,” I said firmly. “I can’t use Mom’s money for this.”

Silence.

Then, he dropped the final blow.

“If you don’t help Mya, don’t ever call me again. I won’t consider you my daughter anymore.”

My breath caught in my throat.

“Are you serious right now?”

“Dead serious,” he growled. “Choose your side, Julie. Your dead mother or your living sister.”

Something inside me broke in that moment.

“You made your choice eight years ago, Dad. You chose them. Don’t put this on me.”

“So you’ll let her die?”

“I’m not letting anyone die. You and Sandra are her parents. Figure it out.”

His voice turned cold. “Then we’re done. Don’t call. Don’t come to my funeral. You’re no daughter of mine.”

And he hung up.

I stared at my phone, frozen. My father—who shattered our family—was now punishing me for not saving his new one.

Then came the calls.

Grandma: “Julie, how could you be so heartless?”

Uncle Mike: “You’re just like your bitter mother.”

Aunt Sarah: “It’s just money. Mya is family.”

They made me feel like the villain. But then I heard Mom’s voice in my head: “Never let anyone guilt you into betraying your own values.”

So, I took control.

I blocked Dad’s number. Then Grandma’s. Then Mike. Then Sarah.

One by one, I cut ties with those who thought I owed my mother’s legacy to her betrayer.

By the evening, the phone was finally silent.

I sat in Mom’s favorite chair, holding her coffee mug, wondering: Did I make the right choice?

My hands trembled. My heart raced. But deep down… yes.

I had kept my promise.

I had protected what Mom built. I had stood my ground.

And I refused to let Dad manipulate me one more time.