Trust between siblings can feel impossible to rebuild once it starts to wear thin.

One woman had looked the other way plenty of times for her sister’s pathological lying, but when her sister asked for a favor, she wasn’t so sure she deserved one.

You’ll want to read on for this one.

AITA for not letting my sister stay at my apartment because she refuses to apoplogize for lying,

My sister (21yo) has a bad habit of lying, and it is starting to bother me a lot.

Her sister even lies about things as important as caring for her pets.

Last week, she lied to me again about walking our dogs when I know she did not, and she refuses to admit that she lied and apologize.

I know this is a tiny lie, but she lies frequently and easily.

I am moving into a new apartment near DC next week.

So when her sister asked for a favor, she said she could comply, but only under one condition.

My sister has an upcoming conference for an internship in DC and asked to stay at my apartment.

I told my sister that she is more than welcome to stay with me, but she first needs to admit to lying and apologize.

She is refusing to do what I asked, so I have informed her that she will need to get a hotel room.

She’s determined to stick to this, no matter what her sister says.

I know my sister is more than financially capable of affording a hotel room, and I would not have done this if she couldn’t.

I am just tired of not being able to trust my sister.

So, AITA for enforcing a boundary in this way?

People like her sister lie so easily that they don’t even realize the long-lasting damage it causes.

What did Reddit have to say?

Lying of any kind erodes trust — there’s no way around that.

Lying about caring for a living being like a dog is not a “small lie”.

It’s high time her lying sister face the consequences of her actions.

This commenter has a zero-tolerance policy for liars.

Being related to someone shouldn’t mean letting them off the hook when they do something wrong.

And this woman was done making room for someone who refused to take responsibility.

If you thought that was an interesting story, check out what happened when a family gave their in-laws a free place to stay in exchange for babysitting, but things changed when they don’t hold up their end of the bargain.