This Redditor couldn’t let her half-sister keep dating a man she shared flesh and blood with. However, little did she know that her mom would genuinely get mad at her for divulging this secret!
Living in a Soap Opera

OP’s (Original Poster) life had become so chaotic recently that she even equated her everyday experiences to a soap opera. So, she turned to Reddit, seeking strangers’ advice on how to move forward.
Product of an Affair

She shared that she was a product of her mom having an affair. Thankfully, her mom’s husband, whom she calls her dad, had decided to forgive her mom and raise her as his own.
She said, “I had a pretty good upbringing.”
Odd One Out

Even though she was accepted by her dad and older sister, others outside their immediate family had a lot to say, especially since she didn’t look like the rest of the family; she was the only redhead, “among other things.”
OP said her relatives would ask many questions, like why she was the only one with a specific trait and more.
Getting Introduced

When OP was 17, her mom took her to meet her biological father under the guise of getting ice cream.
She shared, “She said that she felt I was old enough to know the truth and explained about her affair.”
Promises, Promises

Alongside her mom’s explanations, OP was also asked to promise never to tell her older sister about it.
She was also told that her biological father would never be a part of her life and that he didn’t want her.
Making Do

OP admitted it was a lot to hear and bear, but she “sucked it up” and moved on with her life. She had accepted everything as part of the cards dealt to her.
Her Sister’s Preferences

Currently, OP’s older sister prefers dating older men. She shared, “We like to joke that it’s the result of too many George Clooney movies growing up.”
OP doesn’t have an issue with her sister’s tastes, but one day, she was shown a picture of her sister’s new boyfriend.
Shocking Discovery

Upon seeing the photo, OP was shocked. It turned out to be her biological father!
OP didn’t know what to do, so she took a few days to herself and thought about her next steps.
Her Decision

OP ultimately decided that her sister needed to know the truth, so she told her.
She wrote, “My sister did not take it well and dumped him, but she wasn’t angry with me.”
Opposite Reaction

Now, OP and her sister joked about things. OP wrote, “She’s kinda amused and says that since she banged my dad, she’s my mom and has the extra power to boss me around now.”
However, OP’s mom was furious. She accused OP of divulging a secret that wasn’t hers to share and that she “had no business telling anyone.”
Does It Really Not Matter?

Her mom even said it didn’t matter if OP’s biological father was dating her sister because they weren’t blood-related. She added that her mom said, “It wasn’t like they were talking marriage anyway.”
Seriously Mad

It’s been two months since OP told her sister the truth, but her mom’s still angry at her. She’s still snide and calls OP a “traitor.”
Her mom also tells people how OP “couldn’t be trusted with anything private or important, so beware.”
Confused Mind

OP ended by saying, “At the time, I thought I was doing the right thing, but I’ve never seen my mom this angry before, and she’s sustained that anger for two solid months, so I’m starting to worry.”
She turned to the community to ask whether she was wrong to do what she did. Did she do something “s*****,” and is she the a**hole?
The Community’s Two Cents

Redditors wanted OP to calm her mind as she didn’t do anything wrong.
One said, “Not the a**hole. She needed to know that; that’s weird and a little too close to home. Also, it’s kind of messed up that your older sister was never told about this key part of her family history. Also, if your bio-father knew who she was and her relationship to you, that’s really weird and creepy.”
Watch Out for Creeps

People wanted to call OP’s biological father out for being creepy if he knew who OP’s half-sister was. Redditors also told OP that it was her right to share the story, too, since she was 100% affected by it.
“It is your life that was affected by her affair. It is 100% your business. I have a hard time believing ‘bio’ did not know, and he was having a go at the younger version of his old flame. This is gross, and your sister deserved to know. You are a fantastic sibling and not the a**hole,” said one Redditor. Another wrote, “It is completely your business. You are the product of the affair. I can understand not wanting you to walk around telling every stranger you meet, but when your sister started dating your sperm donor, that was important.”
What should OP do now? Did she make the right choice?
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This post first appeared as She Discovered Her Half-Sister Was Dating Her Biological Father and Told Her Just That. Now Her Mom Is Furious Because She Couldn’t Keep Her Mouth Shut! on Quote Ambition.