Generous 30-year-old man financially supports 16-year-old half-sister, but her bio dad insists he start paying for the whole family’s expenses, he refuses: “Your money, your decision”

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Briana Viser • Writer and Editor
Jun 4, 2025 12:00 PM EDT

Welcome back people of the internet. It's not easy to put boundaries on, especially when love is involved. When we have strong feelings for someone, our internal compass can sometimes go out the window, along with rationality, logic, or even self-respect. We can easily make excuses for other people's behavior if we're in love or even infatuation, and end up being taken advantage of. The point is to eventually see the light and put those boundaries back in place. Things may feel good with someone for a time, but along the path of knowing them you may start to feel sensations that don't actually feel right for you, healthy, or loving. 


Knowing when you get back in tune with yourself isn't something they teach you in school. If you're somewhat of an empath, then it may be easier to be manipulated into dynamics you're uncomfortable with. In the story below, the protagonist stands strong in the odds against him. 
It centers around a man and his half-sister who's also half his age. He's financially well off and can afford to treat her, much to the displeasure of her bio dad and his wife.

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  • 01

    AITA for saying no for giving money to my half sister’s dad and instead preferring to just spend the money on her myself?

    Cheezburger Image 10513017344
    via Brand X Pictures from Photo Images / Canva

    This image is for illustration only, and the subjects are models; the image does not depict the actual subjects of the story.

  • 02
    I'm 30M, my little sister Hope is almost 16. We have the same mum, different dads. Our mum hasn't been in the picture for a very long time.
    via u/IllustriousPlay1358

  • This man has no obligation to give money directly to his half-sister's bio dad. He's not related, he should have no responsibility in the family. The bio dad should understand that since he has a mixed family that things won't be inherently equal in the first place.  

  • 03
    She lives with her dad, step mum and four step siblings. Their financial situation isn't great and they're struggling.
    via u/IllustriousPlay1358
  • 04
    I'm in a fortunate financial position and I like to help Hope out. I often buy electronics for her and she regularly goes shopping with my wife. We also gave her a room in
    via u/IllustriousPlay1358
  • 05
    our house so she can stay here whenever she wants. I also pay her private school tuition.
    via u/IllustriousPlay1358
  • 06
    Cheezburger Image 10513017600
    via inkdrop / Canva

    This image is for illustration only, and the subjects are models; the image does not depict the actual subjects of the story.

  • 07
    This has never been a problem until very recently. Her dad called and asked me if I'd be willing to give them the money we spend on her, so they can resource it better on
    via u/IllustriousPlay1358
  • 08
    the things that she really needs rather than the things she wants or we want to get for her. He made a point that this is what benefits her most. I asked what those are and he said mostly rent and food.
    via u/IllustriousPlay1358
  • 09
    Trying to read in between the lines, this to me meant he's just gonna add this to their budget and spend it for all of them, not just her.
    via u/IllustriousPlay1358
  • 10
    So I said no. I'd rather choose what to spend my money on rather than giving it to him. He didn't insist. But later his wife called my wife and told her this has caused serious
    via u/IllustriousPlay1358
  • 11
    Cheezburger Image 10513017856
    via Arthon meekodong / Canva

    This image is for illustration only, and the subjects are models; the image does not depict the actual subjects of the story.

  • 12
    tension in their home because other kids are upset she has more stuff than they do and they're can't struggle while she's comfortable and they're regularly reminded of privilege when a family is supposed
    via u/IllustriousPlay1358
  • 13
    to be about solidarity and unity, and having a coherent and unified family is more useful for her than shiny stuff. She suggested they
    via u/IllustriousPlay1358
  • 14
    might want Hope to join us for our summer vacation although this is isn't really up to them as she'll be 16 by then.
    via u/IllustriousPlay1358
  • 15
    I can understand this isn't easy for them, but again, my concern is only Hope and not her step siblings or parents. So I haven't backed down.
    via u/IllustriousPlay1358
  • 16
    AITA for refusing to be more agreeable here and putting them in this position?
    via u/IllustriousPlay1358
  • 17
    ImAnNPCsoWhat ⚫ 12h ago NTA. Your money, your decision. Ask if Hope wants to stay with y'all instead. If she does that would make it
    via u/ImAnNPCsoWhat
  • 18
    cheaper for the rest of her family since they have one less mouth to feed.
    via u/ImAnNPCsoWhat
  • 19
    He absolutely was going to use the money on everyone, which isn't evil per say, but that's not what you intend the money to be used for.
    via u/ImAnNPCsoWhat
  • 20
    Armadillo_of_doom • 12h ago NTA He OWES her a roof over her head and food. That's part of being a parent. She is a minor.
    via u/Armadillo_of_doom
  • 21
    You don't owe her a dang thing. And you like to spend your money on spoiling her. On things she wants rather than needs.
    via u/Armadillo_of_doom
  • 22
    I would literally tell them "you made those other kids, I did not. I am not responsible for their happiness. I am not even related to them. And you just admitted to me that you want
    via u/Armadillo_of_doom
  • 23
    to take my money and spend it on the other kids rather than alotting it to things Hope 'needs.' 'The other kids are jealous, let us use your cash to even the field.' No."
    via u/Armadillo_of_doom
  • 24
    What audacity they had to make 4 EXTRA kids on top of having Hope and then getting mad that their resources are too thin to spoil them a little. "Rent and food" indded.
    via u/Armadillo_of_doom

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