It is nice to help your family out when you can, but in order to do that, you need to be able to trust your family.

What would you do if you reluctantly agreed to babysit your sister-in-law’s kids for one day, but then she didn’t come pick them up, and you found out your boyfriend was lying to you about it, too?

That is what happened to the woman in this story, so she told them all off and said her trust is broken.

AITA for telling MIL off after SIL asked me to babysit and left the kids over night without my consent?

My ( F36) boyfriend of 7 years, Justin ( M44) is very devoted to his family.

Being close to family can be a very good thing.

I admired him for it at first, until he made me feel that his sense of obligation and responsibility took from our relationship.

His sister ( F42) is a mess, but he keeps enabling her. She got pregnant after a few weeks of meeting her now ex, and the relationship failed because they hardly knew each other.

They had 2 kids, the last one after 2 years together and public fighting.

All kids are miracles.

She says her kids are miracles given that she was previously married and was unable to conceive.

Both SIL and her now ex suck. She was aggressive and verbally abusive to him, and he was married and cheating.

Cheaters are the worst.

I’ll call him Benny. His wife found out, filed for divorce, and to my surprise, MIL spread the news like it was a great thing.

I say I was surprised because MIL is an infidelity survivor herself (like me), and her behavior encouraged SIL to act brazenly.

Their behavior is abhorrent.

They both acted like it was a huge victory, and that affected my respect for them, and Justin knows it.

SIL and Benny went to live in his deceased great aunt’s empty house, which he was supposedly trying to buy. That lasted for a year until he couldn’t pay rent anymore, and they ended up living with MIL.

It is no surprise that their relationship won’t work out.

Come SIL’s first Mother’s Day, and they were already giving signs of relationship problems.

We spent part of the day at the home of Justin’s grandparents. SIL was there, but Ben was not, which threw huge red flags.

I would have disliked her from the beginning.

This is where my true dislike for her began.

That day was full of drama, we had to hear her fighting him over the phone, then she took this disgusting picture of her holding her new baby with a smug smile and a caption that said “like it or not, I gave him a son, he’s a ‘Smith” (fake surname) and will carry out the family name because of our deep love for each other”.

His ex-wife is the victim, not the villain.

Her talks about his wife became intense.

She complained that his ex was the witch keeping Ben from a happy new family (he has a daughter with his wife) and also dialed her number from his phone and that started a bad situation in which Justin was called to intervene.

Why would his wife take him back?

They had a new baby girl, and more or less 3 months later, Ben walked out on her, reconciled with his wife, and moved away almost a year later.

Supposedly, he pays for child support, medical expenses, and other things but never has time to see his kids, whom they established to do visitation at his parents’ house and not his own.

Sure, that would be difficult.

This has affected her emotionally, and despite my opinion on her, I can understand her pain as a mom and see her kids having to take the back seat.

But also, her kids didn’t ask to come to this world, and their parents created this situation. This has been happening since 2021 (absent dad).

Of course, she can’t just focus on the kids.

SIL has been dating men from apps. The family has been supportive, but sometimes, they get fed up because she has run into married men.

One guy drove right past her while with his wife.

There are lots of bad people out there.

Another guy who was super religious threw a rant and said that he hated her kids. Justin was so angry that he went to the guys place of work but couldn’t find him.

I work a demanding job, and I hardly do anything on weekends except for my own kids.

Nothing wrong with asking her to babysit, but it is okay to say no too.

Justin was out of town because he lost his job and had a gig, so they asked me to babysit for SIL, which triggered me, and I absolutely refused.

They begged me to be helpful, to try not to judge. That it would be only during the daytime.

Here is the first mistake.

I gave in, despite having never done this for her before.

She was supposed to pick her kids up at 6PM. She left them at 10 am, having said that she and her date would have a daylong quality time get to know each other date.

The lies are adding up.

I called her at 7pm, and she said she was on her way. 8PM, she said they stopped for food.

By 10 PM, she was irritated and said she couldn’t control other people and that her date was driving and she couldn’t force him to drive faster, that I was making her nervous and this had an effect on him and if she were driving I would have caused an accident.

This is basically child abandonment.

Long story short, she never reached out past 11PM, I called MIL who said she would talk to her.

I fell asleep and woke up to a text saying that she figured it would be too late to come to my place and that she would call in the morning.

Of course, she won’t pick up.

I called her at 7am and she didn’t pick up. Called later, and MIL answered SIL’s phone and said SIL was still asleep, like it’s my responsibility to also make sure SIL gets a good rest.

I drove the kids to MILs house, and to my surprise, Justin was there.

Wow, these parents are entirely unfit.

He was getting ready to have breakfast while he knew that I had been trying to reach his sister and, on top of that, didn’t offer to pick up the kids himself. Important: he had told me he would get back on Sunday afternoon.

When MIL saw me, she immediately got defensive.

She is lying for her daughter, and that is unacceptable.

She said SIL’s new guy sounded very promising and that it was about time that SIL “got happy”.

I told her to shut up, because SIL hasn’t changed a bit and she’s still building her “happiness” by ‘dating’ everyone.

She should have said no to babysitting, and I’m sure she will from now on.

I said that I had just wasted the majority of my weekend while helping her.

I left, and Justin blew my phone trying to talk after I told him that I was disappointed.

I feel betrayed and angry and my trust in him has been damaged.

Well, that trust is one-sided.

He said that if she left her kids with me it’s because she trusts me.

And that saying I wasted my weekend reflects that I don’t see the kids as my own family.

That whole family is a bunch of liars.

This whole thing (he was hidding from me while I was trying to reach SIL) has done a number on me, mentally.

I sent him a text with how I felt and the fact that he didn’t do anything.

AITA?

No way, she was lied to by everyone involved, and completely taken advantage of. She should break up with Justin and leave that toxic family in the rear-view mirror.

Read on to see what the people in the comments say about it.

She should respect herself enough to leave him.

Yup, time to cut your losses.

They are all trouble.

Maybe she should call CPS.

I am wondering the same thing.

This drama will be her whole life if she stays with him.

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.