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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To tell my sister I don’t want to see her anymore if she doesn’t discipline my nephew for biting me?

1000 replies

IGrewUpInTheFallOut · 30/11/2025 19:21

My sister is a single mum to two children - my nephew, who is 14, and my niece, who is 13. My nephew has autism and her husband left when he realised how tough things would be.

I’ve just got back from a weekend of babysitting for her which has been a bit of a nightmare. My nephew used to be quite violent and angry, but my sister put him into kickboxing when he was 7 and he’s flourished, and it has really helped him regulate himself.

When I arrived yesterday, she warned me that he was quite overstimulated and that I just needed to follow the basic routine (get him to bed at a reasonable hour). I left him to his own devices until I went into his room at about 10:30 and asked him to put his iPad down and go to sleep.

He immediately grabbed hold of me and bit my arm, it must have been about twenty seconds before he let go. He was screaming at me to leave his room by that point, so I did, and went downstairs. I told my sister when she got home today, and she said she would have a word with him.

I’ve just got home and seen how bad it is (I’ve attached a picture). I sent it to her and asked how she had dealt with it and she said she asked him, but he said he felt overwhelmed and didn’t want to go to sleep, so he lashed out. She says that in her mind, that’s the end of it and she won’t be pushing it further as he can’t help feeling overwhelmed.

I’ve said in that instance I don’t feel comfortable being around him again and I won’t attend family Christmas. Now she and my mum are telling me that I’m selfish and I will ruin the Christmas period for everyone if I don’t come.

AIBU to draw this line in the sand?

To tell my sister I don’t want to see her anymore if she doesn’t discipline my nephew for biting me?
OP posts:
Differentforgirls · 01/12/2025 06:44

AnyoneWhoHasAHeart · 30/11/2025 20:53

Good god what a load of drama.

It’s very clear that all perspective has been lost, and the OP has escalated this situation so far that she’s looking like a bit of a tit in the process.

Let’s look at the facts.

The OP babysat her nephew who is autistic. When she went to tell him to go to bed he lashed out and bit her. So far, so not acceptable and there’s no question he was in the wrong, regardless of whether he’s autistic, and that that behaviour should be able to be managed in the longer term.

But now the OP has turned it into how terrified she was all night, how terrified she is to be around him at Christmas, maybe the police ought to be involved, she doesn’t feel comfortable being around him any more because he’s clearly going to be after her while she’s passing the gravy boat across the table.

But all of this only applies because the sister won’t remove his screen time.

Let’s be honest here.

Either the OP is terrified of this child to the extent she’s prepared to go NC with the family, or she’s not.

And considering she’s prepared to let bygones be bygones upon removal of the iPad it seems pretty clear that she’s not, and that this is just a good reason she’s using to walk away from them all.

It’s one thing to say that you won’t babysit a child who is prone to violence, using a child as an excuse not to go to Christmas is disgusting.

Disgusting? To not want to go for a dinner? Good god.

Differentforgirls · 01/12/2025 06:50

FoxRedPuppy · 30/11/2025 21:01

It’s not an excuse, it’s a reason. He needs to be helped to understand his own needs and work on transitions.

Was his routine followed exactly? Were the other possible reasons for a meltdown.

Would you punish a diabetic child for having a hypo? It’s a similar thing.

.

ChristmasCrackez · 01/12/2025 07:02

Wow, what a pile on. The OP is scared and has been assaulted and you think she’s in the wrong.

What should have happened is, your sister should have called you and massively apologised and said that this is the result of him being overstimulated, that “punishing” him would have the opposite effect, but she’ll take steps to make sure it doesn’t happen again by doing X and Y.

So he can be aggressive, and he can’t self regulate, and when he’s overstimulated he lashes out……oh and he’s brilliant at kickboxing. That has the potential to end very badly all round. Surely another hobby would have had the same effect, rather than picking a violent sport.

Your sister was presented with the scenario of take her sisters side, or take his, and she chose him. She could’ve handled it better.

I would take a step back and not go nuclear over it, but draw a line in the sand and say you are no longer helping out with him in any way or form, and just don’t offer. If anyone asks just say he’s too big for you to deal with now.

PersephoneParlormaid · 01/12/2025 07:04

Firstly, you should never baby sit again or be with him on your own.
Secondly, you should do whatever you want at Christmas, don’t be blackmailed into doing what they want.
And make sure you’re not in line to have him if anything happens to your sister.

Btowngirl · 01/12/2025 07:05

It’s curious to me how it sounds like this is the first time something like this has happened? Is there back story you haven’t mentioned in this post?

Whilst you have my empathy with it hurting and being unexpected, if you were being like this about my disabled child I would agree it’s best you don’t come if you’re going to dramatise the situation.

Yes he bit you and yes it’s unacceptable, but you were the adult in the moment and by the sounds didn’t say a word? I would also be having a word myself and assessing the situation, but if my sister was willing to cut contact due to an autistic melt down I would be so disappointed. I haven’t read all of your comments but of the ones I have, a large percentage are surrounded around ‘what about this and what about that’. You could say that about anything? You sound a bit ableist to be honest.

FWIW my nephews have a myriad of additional needs and I wouldn’t dream of cutting them off. No more baby sitting is understandable but making a point of not going at Christmas to spend time with your family? Not necessary and clearly just making a point or looking for an excuse to spend it with your partner.

LightUpLavender · 01/12/2025 07:08

Your sister could have handled this better, it’s hard parenting autistic children and different approaches are needed but sounds like she could have done more to make you feel heard and supported op. Hope you can all find a way forward xx

CatchTheWind1920 · 01/12/2025 07:13

At the end of the day, no matter the circumstances, I'd expect an apology at least from my sister and some empathy.

I don't blame you wanting to avoid her for now, op.

Redburnett · 01/12/2025 07:14

Being autistic does not justify a violent assault for which he could be prosecuted if you chose to report it. Minimising does not help in the long run.

Arghhhhggggggggggg · 01/12/2025 07:15

Btowngirl · 01/12/2025 07:05

It’s curious to me how it sounds like this is the first time something like this has happened? Is there back story you haven’t mentioned in this post?

Whilst you have my empathy with it hurting and being unexpected, if you were being like this about my disabled child I would agree it’s best you don’t come if you’re going to dramatise the situation.

Yes he bit you and yes it’s unacceptable, but you were the adult in the moment and by the sounds didn’t say a word? I would also be having a word myself and assessing the situation, but if my sister was willing to cut contact due to an autistic melt down I would be so disappointed. I haven’t read all of your comments but of the ones I have, a large percentage are surrounded around ‘what about this and what about that’. You could say that about anything? You sound a bit ableist to be honest.

FWIW my nephews have a myriad of additional needs and I wouldn’t dream of cutting them off. No more baby sitting is understandable but making a point of not going at Christmas to spend time with your family? Not necessary and clearly just making a point or looking for an excuse to spend it with your partner.

It's crazy to me how so many posters have come on here saying they have ND relatives and yet they can't spot that the OP Is showing many signs of being ND herself

Her dramatising is actually probably catastrophizing -- catastrophizing is the tendency for autistic individuals to quickly and automatically jump to the worst possible outcome in a situation, often due to high anxiety and unique brain wiring. This cognitive distortion can be triggered by minor issues, leading to a "snowball effect" of negative thoughts, and is associated with a high state of anxiety and the potential for mental health challenges

The way she's rightfully hurt about her sister and mothers reactions- RSD - Rejection Sensitive Dysphoria, an intense emotional response to perceived or actual rejection, criticism, or failure, often associated with ADHD. It is also an acronym for Reflex Sympathetic Dystrophy, a past name for Complex Regional Pain Syndrome (CRPS), a chronic pain condition.

Rigid thinking is a cognitive style characterized by inflexible, stubborn, and all-or-nothing thought patterns, which makes it difficult to adapt to new situations or consider alternative viewpoints. It can lead to stress and frustration when things don't go as planned and may be a symptom of or related to conditions like anxiety, ADHD, or autism. This mental inflexibility can limit problem-solving, creativity, and personal growth.

She doesn't sound ableist. She sounds autistic.

Differentforgirls · 01/12/2025 07:16

IPM · 30/11/2025 22:12

I'm listening to what you're saying and it still doesn't make sense.

You're either utterly terrified of him or your not.

And you have literally no idea whether your sister would step in during an attack, whether she punishes him or not.

Then she shouldn’t go for Christmas if the sister can’t be trusted.

Climbingrosexx · 01/12/2025 07:16

IGrewUpInTheFallOut · 30/11/2025 22:48

I wish I’d not posted. Clearly I was to blame for this and I’m sorry if I upset anyone by posting. I just felt confused but I can see that I was wrong, I’ll apologise to my sister in the morning

You weren't to blame, autism is not a free pass to do as you like and certainly not to injure someone. You deserve to be protected and in this situation I would feel vulnerable and worried for my safety.

Redburnett · 01/12/2025 07:22

In your position I would go with your partner to his family for Christmas.
The sad thing is that sooner or later nephew is likely to turn on his mother or sister and because he has got away with it biting you they will not be able to deal with it effectively. And in the longer term he may end up in the criminal justice system ......which would be very sad given that he has been doing well at school and so on. Obviously never babysit again.

PinkMagpie · 01/12/2025 07:24

OP please don’t apologise to your sister in the morning! You did absolutely nothing wrong and I would feel exactly as you do in your situation.

Definitely have Christmas with your partner’s family and don’t babysit again

LondonLady1980 · 01/12/2025 07:28

YANBU OP for being so upset by what has happened.

I would still go to the family dinner though, but I would be keeping my distance from my nephew. Just don’t go near him where possible.

I would feel very disappointed in my sister if she hadn’t taken it seriously and hadn’t ordered an apology from the nephew. I may possibly give her some leeway though as it may be that she’s frightened of her son and is scared of any comeback if she challenges him.

It’s still very disappointing though that she hasn’t seemed to have taken this seriously and that she doesn’t seem very remorseful. I would be mortified if my child had physically harmed my sister, even if they did have autism, whereas tut sister doesn’t seem to care at all that it’s happened, and that’s not okay.

But yes, I’d still celebrate Christmas with them Bir give your nephew and your sister a wide berth, but I certainly wouldn’t be babysitting again!

Stompythedinosaur · 01/12/2025 07:48

It's obvious distressing that you were hurt, and totally reasonable for you not to babysit again.

The police won't prosecute this, not in a million years, so I'd move away from that. I cannot tell you how many times I've been assaulted by mentally ill or neurodisabled dc. The police won't consider a prosecution to be in the public interest.

Your motivation for wanting your nephew punished seems to be more about revenge than a desire to help him learn, and that's a bad look for the adult in the situation. There's no point in punishing a dc for a behaviour they can't control. You manage it by changing the actions of the adults (different routine, different level of supervision etc). Your are unreasonable about this imo.

Differentforgirls · 01/12/2025 07:50

Thunderpants88 · 30/11/2025 23:48

Oh get an actual grip! He didn’t even break the skin! Ergo not a hard bite where you should be “terrified” and as for “he could have severely hurt me” well he didn’t so what’s the big drama?

Just bow out of family get togethers quietly but imagine being a parent of this child 24/7. But here you are, just a few hours in, “terrified”. Try putting yourself in the shoes of your sister and catch a grip of your self pitying ways.

Nasty!

Differentforgirls · 01/12/2025 07:56

TheCheekyCyanHelper · 01/12/2025 03:44

Now you're acting ignorant. I can see why your family is exasperated with you. You are acting more like a child than him.

He is not a child. There is one ignorant person here and it's not the OP.

Ellie1015 · 01/12/2025 08:00

You have had a hard time on here OP. I am glad you have taken the more constructive advice on board and are going to speak to your sister.

I dont think any parent would stand and watch another person being hurt and not step in, so try not to worry about that. Also you will not be in charge of asking nephew to do anything so not likely to be the person he attacks if it did happen at Christmas.

As a loving aunt and sister I would explain to sister it was scary, but you understand. Ask her if nephew is upset about it, if he is i would have a phone call to reassure him you love him and can both move past it.

For your own sake I wouldnt be around him alone if you feel unsafe. Perhaps you and your mum could babysit together if sister really needs a break, much further down the line.

Clonakilla · 01/12/2025 08:00

IPM · 30/11/2025 19:53

But it's not up to the OP.

Blackmailing her sister into parenting her way isn't going to help anyone.

And the OP just makes herself look very silly being too 'utterly terrified' to join the family Christmas one minute, and good to go the next as long as he loses a bit of screen time.

Please don’t tell a woman who’s been very frightened by an act of male violence that she’s being silly to continue to feel afraid. This is flat-out misogyny.

I doubt that punishment is the answer and I really feel for OP’s sister as this is a very difficult situation. But that doesn’t mean the OP can’t feel frightened after this event. She is not foolish to feel that way.

So much victim-blaming behaviour hidden under what looks very much like virtue-signalling here.

ParkMaiden · 01/12/2025 08:00

IGrewUpInTheFallOut · 30/11/2025 19:36

At the moment I don’t think it’s broken the skin but I’m keeping an eye on it because it does feel quite warm and sore

You’re being ridiculous

FailMeOnce · 01/12/2025 08:02

PinkMagpie · 01/12/2025 07:24

OP please don’t apologise to your sister in the morning! You did absolutely nothing wrong and I would feel exactly as you do in your situation.

Definitely have Christmas with your partner’s family and don’t babysit again

This. The utter victim-blaming and coercive guilt being employed in this thread is disgusting.

No woman is obliged to put up with being physically assaulted by any young man (who will be a fully grown man in a few short years), whatever the reason for it.

I make no comment on whether your sister is making a rod for her own - and her daughter's - back as I don't know the ins and outs but, OP, please protect yourself from violence as you are entitled to do.

You might also consider being a port in a storm for your niece in future. This must be very difficult for her to live with.

puppymaddness · 01/12/2025 08:04

IGrewUpInTheFallOut · 01/12/2025 06:32

I don’t think I want to. She’s maintaining that what happened is okay and that it’s really not his fault.

is she maintaining it's ok?

Or is she just refusing to blame/ be angry/ punish him.

Because those are two different things OP.

nomas · 01/12/2025 08:04

IGrewUpInTheFallOut · 01/12/2025 06:32

I don’t think I want to. She’s maintaining that what happened is okay and that it’s really not his fault.

Haas there been a message from sister or call where she has said this?

RareJoker · 01/12/2025 08:05

Vivi0 · 30/11/2025 22:46

Well, first off, this thread has fuck all to do with rape.

But no, I don’t believe for a second that autistic children who lose control and lash out when overwhelmed is a predictor for rape.

Do you have any studies you could post that show a link between autistic overwhelm and sexual violence?

She’s not saying it’s a predictor for rape. Shes saying that the same, centuries-old excuses wheeled out to excuse male violence are being trotted out here.
Her nephew assaulted her. She doesn’t feel safe or reassured that her mum or sister have the requisite tools to support her or control his behaviour, so of course she has every right to avoid his company.

puppymaddness · 01/12/2025 08:07

RareJoker · 01/12/2025 08:05

She’s not saying it’s a predictor for rape. Shes saying that the same, centuries-old excuses wheeled out to excuse male violence are being trotted out here.
Her nephew assaulted her. She doesn’t feel safe or reassured that her mum or sister have the requisite tools to support her or control his behaviour, so of course she has every right to avoid his company.

Oh please

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