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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:
BaronessEllarawrosaurus · 30/11/2025 20:05

Of course 10.30 is a reasonable bedtime however for a child with autism who was on technology that sudden switch to go to bed now would overwhelm mine, they would lash out. It's hard to explain but there would be just enough self control not to do anything too serious but they would want to lash out and hurt because they can't cope with their emotions in that moment. I've had black eyes, deep scratches. Punishing doesn't actually help because they already hate themselves for losing control and a punishment just seems to perpetuate that anger. Understanding and support, talking it through and suggesting other ways to handle situations like that (and that's a 2 way conversation because I made mistakes too in the way the event got triggered first). Acknowledging what we can both do going forward to stop it happening again.

HighlyUnusual · 30/11/2025 20:06

Taller than you, almost adult strength male, attacking and not letting go, I would be frightened too, OP, and you are not in a situation like a school or somewhere to get help or know the right protocols to deal with this. It's 'only' a bitemark this time- what about next time?

Don't babysit (wrong word, he's not a baby) again. I would go for Christmas as you won't be on your own.

Everyone saying it's only a small thing, children just get overwhelmed, I think knowing your own child and being able to handle this is key here, I've come up against one of my teen children when they were very angry and I would never never ask another adult to do it. If they did that in public or to other people, it would be assault and not this minor 'that's just what happens in families' type event. You aren't trained to de-escalate and you don't know him and his strength and behaviour patterns, and no-one cares now, it's just excused.

I feel sorry for your sister as this has the markings of being awful for everyone in the future, including the son who is tacitly being allowed to express his now considerable strength against women carers around him and who isn't in a safe environment to do so.

OneBookTooMany · 30/11/2025 20:06

GoingForAGallop · 30/11/2025 20:00

I think you need to trust Mum’s judgement on how to deal with her son, she is the expert.

Autistic children thrive on routine and having a different person putting them to bed would be extremely unsettling. I don’t think you should babysit again if you don’t empathize with the difficulties faced. The injury looks very minor, but you seem hell bent on expecting the child to be punished in revenge. Do you not understand that autism is a communication difficulty and this was the child’s way of expressing their upset at the situation. Mum dealt with it well by speaking to him about it. You’ve handled the situation badly, sulking and acting childishly.

Will mum still be the expert when, maybe aged 17, he bites, kicks or thumps his girlfriend?

There are a lot of violent men around, they didn't suddenly lick it off the floor and become violent when they were 16, you know and most of them have according to you, "expert mums."

I really hope it is men writing some of these victim blaming posts and not other women.

Stay away from this violent male and don't be shamed into thinking-as so many of us that you must accept it because he had a reason...in this case overstimulation. It is not ok and he is of an age to know it is not ok and so is your sister and your mum.

Gwenhwyfar · 30/11/2025 20:07

WhamBamThankU · 30/11/2025 20:05

I’m not victim blaming, and 14 isn’t tiny no, but children with ASD have ….additional needs. Which may be more sleep, or a certain bedtime. The sister should have specified when to OP if this was possibly a contributing factor. I have an almost 13 year old with ASD and have him asleep for 9.30 as I know how he will behave with less sleep. I’m not ignorant to the situation.

Sister didn't give a bedtime so yes, this is victim blaming. Teenagers can have alter bedtimes than younger children. That's obvious.

IGrewUpInTheFallOut · 30/11/2025 20:07

nomas · 30/11/2025 20:05

Have you told her that you won’t be babysitting again?

Yes. I said I won’t put myself in that position again and that I’m not really feeling like going over for Christmas because I can’t guarantee my safety. She’s tried to guilt trip me by saying that if I don’t babysit she won’t have a night off ever, and that I’m ruining Christmas.

OP posts:
puppymaddness · 30/11/2025 20:07

Bitzee · 30/11/2025 19:41

That doesn’t look that bad?? DS (reception age) was bitten by a nursery child at playtime recently and it looked a hell of a lot worse than that. But totally fair enough if you don’t want to/feel able to babysit him anymore. Especially as he’s 14 if he were to physically lash out again it could potentially be a lot worse and you shouldn’t be put in a situation where you’re on your own and don’t feel safe. But it’s not your business to tell your sister how to discipline her child, he might need a non standard approach depending on how his autism presents, and to not go to family Christmas would be a massive overreaction.

Yeh my 2 year old has come home with bite marks worse than that:

it's fair enough that you would never baby sit him again but refusing to go to Christmas just feels like you are trying to punish everyone for not sharing your perspective on how to best manage this..

Gwenhwyfar · 30/11/2025 20:07

"I think you need to trust Mum’s judgement on how to deal with her son, she is the expert."

She's obviously not, is she! She thinks it's Ok for her son to bite his aunt.

IGrewUpInTheFallOut · 30/11/2025 20:08

HighlyUnusual · 30/11/2025 20:06

Taller than you, almost adult strength male, attacking and not letting go, I would be frightened too, OP, and you are not in a situation like a school or somewhere to get help or know the right protocols to deal with this. It's 'only' a bitemark this time- what about next time?

Don't babysit (wrong word, he's not a baby) again. I would go for Christmas as you won't be on your own.

Everyone saying it's only a small thing, children just get overwhelmed, I think knowing your own child and being able to handle this is key here, I've come up against one of my teen children when they were very angry and I would never never ask another adult to do it. If they did that in public or to other people, it would be assault and not this minor 'that's just what happens in families' type event. You aren't trained to de-escalate and you don't know him and his strength and behaviour patterns, and no-one cares now, it's just excused.

I feel sorry for your sister as this has the markings of being awful for everyone in the future, including the son who is tacitly being allowed to express his now considerable strength against women carers around him and who isn't in a safe environment to do so.

It’s the next time that worries me.

What if next time it’s me and he lashes out? Or if he hits his sister? Or god forbid a girl at school turns him down or something and he is physically violent?

OP posts:
tripleginandtonic · 30/11/2025 20:08

Lookingforthejoy · 30/11/2025 19:31

If he was in meltdown then he wasn’t in control of his behaviour so punishing him won’t impact his future behaviour.

At 14 that's not a defence.

Gwenhwyfar · 30/11/2025 20:08

"Yeh my 2 year old has come home with bite marks worse than that:"

Presumably from another toddler. If it was from a 14 year old, I doubt you'd think it was OK.

nomas · 30/11/2025 20:08

This reply has been deleted

Message deleted by MNHQ. Here's a link to our Talk Guidelines.

Ddakji · 30/11/2025 20:09

It sounds to me that your sister should have changed her plans rather than have you babysit a potentially and known to be violent teenage boy because he was overstimulated. At the very least she should have left you completely clear instructions as to the evening’s routine.

She is hugely at fault and my guess is she knows it.

I understand that she’s having a difficult time thanks to her arsehole husband bailing, but that doesn’t mean she gets to endanger her sister and then brush it off.

TFImBackIn · 30/11/2025 20:09

If the alternative is spending Christmas on your own, then I'd spend the day with them but I would never babysit for him again. If his sister is OK then I'd offer to have her in my own house, but I wouldn't put myself in the position of caring for him on my own.

PumpkinTwistyWindToots · 30/11/2025 20:09

IGrewUpInTheFallOut · 30/11/2025 19:38

A restriction on screen time or kickboxing at a minimum, she took him to his favourite place today and I feel like it’s just reinforcing that his behaviour is acceptable

You're not taking into consideration his needs. This is just inappropriate as a response. I also think you're being petty and ridiculous to refuse to go to Christmas.

Eviebeans · 30/11/2025 20:09

IGrewUpInTheFallOut · 30/11/2025 20:07

Yes. I said I won’t put myself in that position again and that I’m not really feeling like going over for Christmas because I can’t guarantee my safety. She’s tried to guilt trip me by saying that if I don’t babysit she won’t have a night off ever, and that I’m ruining Christmas.

does your mum ever look after them?

FlyingApple · 30/11/2025 20:09

IGrewUpInTheFallOut · 30/11/2025 20:07

Yes. I said I won’t put myself in that position again and that I’m not really feeling like going over for Christmas because I can’t guarantee my safety. She’s tried to guilt trip me by saying that if I don’t babysit she won’t have a night off ever, and that I’m ruining Christmas.

Well that's deeply unfair of her. You're not ruining Christmas because you don't want to be harmed.

ThatLemonBear · 30/11/2025 20:09

Voted YABU just because it shouldn’t stop you visiting over Christmas, surely your nephew will be supervised at all times. YANBU to never babysit again

Ddakji · 30/11/2025 20:09

IGrewUpInTheFallOut · 30/11/2025 20:07

Yes. I said I won’t put myself in that position again and that I’m not really feeling like going over for Christmas because I can’t guarantee my safety. She’s tried to guilt trip me by saying that if I don’t babysit she won’t have a night off ever, and that I’m ruining Christmas.

And there we have it. Your value is as a babysitter, not as a sister.

IGrewUpInTheFallOut · 30/11/2025 20:10

TFImBackIn · 30/11/2025 20:09

If the alternative is spending Christmas on your own, then I'd spend the day with them but I would never babysit for him again. If his sister is OK then I'd offer to have her in my own house, but I wouldn't put myself in the position of caring for him on my own.

I think I’d rather do it at this point. My partner has extended an invitation to his family Christmas though and to be honest I’m considering it

OP posts:
WhamBamThankU · 30/11/2025 20:10

Gwenhwyfar · 30/11/2025 20:07

Sister didn't give a bedtime so yes, this is victim blaming. Teenagers can have alter bedtimes than younger children. That's obvious.

It’s not obvious with SEN children Confused

PumpkinTwistyWindToots · 30/11/2025 20:10

IGrewUpInTheFallOut · 30/11/2025 19:41

No I really don’t understand and I don’t understand how she can say I’m selfish and ruining Christmas for not wanting to be around someone who attacked me. I’m confident that if I reported it to the police he’d be deemed as having capacity to take part in criminal proceedings

Are you fucking serious? You think police would charge an autistic 14 year old for biting his aunt? You're on another planet.

IGrewUpInTheFallOut · 30/11/2025 20:10

Eviebeans · 30/11/2025 20:09

does your mum ever look after them?

Very rarely. Funnily enough she thinks it’s too much of a risk because he could overpower her!

OP posts:
nomas · 30/11/2025 20:10

PumpkinTwistyWindToots · 30/11/2025 20:09

You're not taking into consideration his needs. This is just inappropriate as a response. I also think you're being petty and ridiculous to refuse to go to Christmas.

And you don’t actually give a shit about OP’s safety and wellbeing at all, do you?

MNOP · 30/11/2025 20:10

IGrewUpInTheFallOut · 30/11/2025 19:55

Maybe I am very silly, but maybe as a 5 foot 4 woman having a 5 foot 6 teenager who has been training regularly for the last seven years grab hold of me and not let go despite me begging him to has really shaken me up and I don’t particularly want to be around him or anyone who defends it at the moment

I thought he was nearly the same height as you. Now he’s 2” taller?!

godmum56 · 30/11/2025 20:10

IGrewUpInTheFallOut · 30/11/2025 20:10

I think I’d rather do it at this point. My partner has extended an invitation to his family Christmas though and to be honest I’m considering it

good solution. I think your sister trying to guilt you is unforgivable.

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