Sister changes her house lock to avoid his brother moving in with her, her parents make a huge drama implying it's her duty, and gave him a key anyway: 'I had the exterior locks changed and did not give my parents another key.'

Family is not just a community that supporters but also one that obliges you to do things you don't want to do for them.

From lending money to provide them with a house to leave and a bed to stay, anything can be asked by your family members, and if you want to avoid a fight, you have to do it. You may feel used or as if they are dependent on you. Unfortunately, there is not much you can do about it. If you complain or suggest that it's unfair in the slightest, then you're inconsiderate and mean. Boundaries are nonexistent, and your things are communal and more available to others than yourself. Welcome to having a toxic family!

Also common in toxic families is the preferred child, and usually it isn't you. If you have a brother who can't maintain a job, never pays rent on time, and blames everyone except himself for his mistakes and problems. Then that is the preferred child. Even better if you have an amazing job, incredible academics, and a super organized work-life balance. The more amazing you are, the more they justify the unsuccessful life your awful brother has. And it always comes with phrases like: "life is not as easy for him" or "you have everything, why not share it with your brother?" Almost treating him as an infant who can't do anything right. Well, that is the situation of the woman in this Reddit Story.

Other daughters that are "blessed" with this horrible fate just bend their heads down and try to help with what they can, only to be presented with no gratitude from anyone. But the user who wrote this story wasn't like that. She grew a grip, tired from this situation, and said no, multiple times. When his word was overruled, she took action. She changed the locks. She went above and beyond to change her sad destiny, and for that, a whole family drama was created in which the least affected person was his brother. He just moved back in with his parents and didn't care about anything. Now, even though her parents are mad at her, she stayed clear-minded about her decision, and that is the best thing she could have done.