Not every sibling favor is as simple as it sounds.

One young woman had worked hard to build a space of her own.

So when her irresponsible sister demanded to take over her lease while she was away, she found herself caught in a messy web of expectations and resentment.

Read on for the full story!

AITA for choosing my friend over my sister?

I (23F) got this 1-bedroom apartment about a year ago, and honestly, it’s the first thing I really worked hard for.

I spent so much time and money fixing it up and making it nice.

So one day, her sister came to her with a request.

In two months, I’m leaving for 6 months for Erasmus, and my younger sister (19F) asked if she could move in while I’m gone because it’s close to our university.

We attend the same campus.

She says she’s tired of living with our parents, tired of commuting, and that she keeps fighting with them.

But she decided this is the last person she’d want left unattended in her space.

I thought about it, but honestly, she’s a mess.

Her room is disgusting all the time, like there was a moldy pizza box under her bed for months, and she just acted like it was normal.

Like, sorry, but no??

So when she breaks the news, her sister doesn’t take it well.

I told her I’m going to sublet it to my friend from uni (who goes to the same uni as her, too).

Now she’s telling everyone I’m a selfish jerk.

Her family is starting to guilt trip her too.

My mom is also being dramatic, saying I’m heartless and it’s just 6 months, and it’s family.

But like, if something happens, it’s MY name on everything, not hers.

Ultimately, she feels justified in her feelings.

Now I feel bad because everyone’s acting like I’m the villain, but I really feel like she’s being entitled and dumb.

It’s not my job to babysit her and risk everything I worked for.

AITA?

Looking out for your best interests isn’t a crime, no matter what her entitled family may think.

What did Reddit make of all this?

This user thinks some well-place fibs could have saved her a lot of grief with her family.

A picture is worth a thousand words.

This commenter wonders why the parents can’t see her point of view on her sister’s lack of cleanliness.

This sister doesn’t seem near trustworthy enough for this responsibility.

She had poured her time, money and pride into that apartment.

She wasn’t just going to let her sister waltz in and grime it all up.

She wasn’t going to give into the guilt trip — not this time.

If you liked that post, check out this story about a guy who was forced to sleep on the couch at his wife’s family’s house, so he went to a hotel instead.