‘I don't plan on sharing my savings.I had to shut it down as fast as possible’: Sister Leah demands a cut of her younger brother’s 300k portfolio he spent 9 years building and storms off when he says no

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Etai Eshet • Editor
Sep 19, 2025 2:00 PM EDT

Family finance always finds the petri dish, and in this case it is a nine year experiment where one sibling kept feeding the culture with quiet monthly deposits while the other discovered the thrill of declaring paper gains a lifestyle subsidy and decided that sharing articles at twenty one somehow entitles her to a retroactive equity stake at thirty four, which is a beautiful story about education until it turns into an invoice with a guilt header and a moral footer about who works harder and who is better with money. 

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  • AITAH for refusing to share my "inheritance" with my sister?

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  • 9 years ago, I then 21M started my first part time job. Within a few months, my sister "Leah" (25) was finally rewarded with a permanent full time job in her desired field and work environment.
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  • My parents and I were very proud and excited for her because she genuinely liked her work despite its challenges.
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  • The arc is not unique, but it is always weirdly funny in the same way a treadmill is funny when someone insists they ran a marathon because they stood near it and shouted tips about incline while the other person actually pressed start and kept pressing start every payday for nearly a decade, then arrived with a down payment, a funded emergency kit, and the kind of boring spreadsheet that makes parents quietly proud and siblings invent new math about shared learning and the inheritance of the stock market. 

  • At that time, I wasn't sure what to do with the extra money since we still lived with our parents.
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  • I started learning about investing. One day, Leah saw what I was doing and expressed her interest in learning too.
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  • I remember reading about topics that had caught my eye at the time and we regularly shared our sources.
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  • During the first year, we contributed to our respective accounts consistently into investment products that suited our individual risk tolerance.
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  • I believe this is where things started to turn with our relationship. When my sister saw that her account had grown after a year, she started spending more of her take-home pay on various things.
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  • She would often say that she deserved to splurge more on herself since her investments had grown and will grow more than her increased expenses.
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  • It was none of my business so I didn't say anything. It was her money and income afterall but I did miss the time we spoke about investing.
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  • Those little meetings happened less and less as time went on. Fast forward to now, I (30M) plan to move out of my parent's home.
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  • I will make a sizable downpayment on a property and still have approximately 300k saved for retirement / an emergency fund.
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  • Initially, my parents were ADAMANT about gifting me money since they wanted to help both of us once we decided to leave.
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  • It took showing them my brokerage account and explaining that this wouldn't be possible without their generosity (e.g.
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  • paying for groceries and charging well below market "rent"). I do not regret sharing this with either of
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  • A week or so later, my sister caught wind of this. She was insistent on sharing this "inheritence from the stock market" since she claims to have contributed to my learning.
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  • Leah went on about how it wasn't fair that I never used my money, I was being a "hoarder", that she had more expenses and more debt as a result, and that she worked more (often overtime) to make ends meet.
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  • What really happened is the unglamorous triumph of habit over appetite, where compound interest does not care who had the better anecdote, and brokerage statements only print one name, and all the dinners at home and low rent and parental groceries that helped both kids do not magically transform.


     

  • I showed her my portfolio. Specifically, I showed her the monthly contributions that has happened over the years.
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  • I asked her were any of these made by her. I showed her my portfolio's composition.
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  • None of her recommendations were there due to my lack of knowledge, interest, or being (what I believed to be) speculative in nature.
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  • Leah went silent, got up and left the house. My parents overheard this unfold. They said that while they feel I am in the right, I was harsh in a "matter of fact" kind of way.
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  • Melodic-Skin9045 NTA. You did the right thing. she spent all hers and now wants to spend yours. Do not give her a dime. She will use you as her ATM if she can.
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  • Sharp_Forever3720 NTA. That's your savings, not "inheritance." She didn't fund your portfolio, her spending choices are her responsibility. You might apologize for a blunt tone, but you don't owe her a dime.
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  • Xzandrite NTA. Sister sounds like an entitled spoiled brat tbh. Your relationship may suffer but it will be because she wants you to arbitrarily give her money. Hopefully your parents or someone else will straighten her out.
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  • Atlantic_Nikita Nta. Ask her who did for to call your savings an "inheritance"
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  • Nymph-the-scribe NTA at all, you played it smart, she didn't. That's not your fault, responsibility, or obligation. If you want to, tell her what you can do is help her with her investments and financial stability as in guide her, share your knowledge, help her create a budget, etc. Not give her a cent. If she would rather affect your relationship negatively than admit and accept, she made bad choices, that's on her.
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  • fantasybreeder NTA. "Harsh in a matter of fact way" just means that she was objectively wrong and there was no gentle way TO break that to her. Congrats on the house.
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  • Playful_Site_2714 NTAH. Tell your parents: one splurged. The other saved. And now you tell the one who saved she was "harsh" to not give the spluring one some of HER savings because she threw her own out of the window? Listen: SHE was "harsh" feeling entiteled to take half of my money! Not ME for not giving her any!
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  • Parents will call the tone harsh because facts rarely wear soft clothes, but the fix is not different just because it is family, and the posture going forward is to keep the money talk dull and the holidays gentle, to move out, set the autopay, stop narrating balances at dinner, and remember the only honest split of an account funded by one person is zero, which might sound mean in theory but reads like gravity in practice and at least has the decency to be consistent every month.

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family drama inheritance brother mother tradition siblings family feud favoritism wedding aunt in laws mother in law sister fiancé grandmother Father
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