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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

To get involved with DSD's weight?

41 replies

orangefoxsoda · 09/08/2026 19:41

We have DSD 7 with us full time for the summer. It pains me to say it but she's gained a lot of weight this year. Until about age 6 she was consistently 30th centile for height and somewhere around 20th-25th centile, she's now 30th centile for height and 90th centile for weight. BMI comes out at 98th centile on the NHS BMI calculator. Her weight has increased steadily over the last year, she's had a recent growth spurt. We've tried talking to DP's ex about it, she just gets very defensive. The relationship there is already quite difficult. It's obvious she thinks it will sort itself out and isn't going to do anything about it.

WIBU to just put DSD on a diet this summer, get her exercising more etc and take control of it ourselves while we have her with us?

OP posts:
Sartre · 09/08/2026 20:10

If she’s only with you in the school holidays it won’t really matter will it? She’ll go home and gain weight again.

blackonblue · 09/08/2026 20:09

There’s not much you can do. Even if she did lose weight, she will just put it back on again when she’s with her Mother.

I’d have thought a largely absent Father is a bigger concern really. At least her Mother is living with her doing the hard work of raising her.

KrazyKatty · 09/08/2026 20:06

Kids grow like Christmas trees. Out then up.

Unless you know she’s eating a very crappy diet, the increase in weight could be perfectly normal.

I remember DS at around 8yrs old putting on weight one summer AFTER I’d bought his school uniform for the next September. 🤦🏻‍♀️

I had to order some new bigger trousers via Amazon as the local shop didn’t have anything in his new size.
Within about 4 months, at Christmas, he’d had a growth spurt and was back to being tall and skinny again.

He’s an older teen now and still tall and skinny.

Vaxtable · 09/08/2026 20:03

She’s 7 for gods sake. You don’t put 7 year olds on diets. By all means restrict treats but you don’t stop them and by all means give her good meals to eat but if she says she is hungry give her fruit or whatever

she still has a lot of growing to do. And any diet may end up giving her food issues
that said you be led by her father really it’s nothing to do with you

Minasama · 09/08/2026 20:03

Make sure that at your house, she gets healthy food and not too much of it and is running around outside, going for regular walks with you etc.
Try and get DP to get mum to cut out sweets/crisps/too many ice creams etc. but ultimately this is hard for you to influence.

At least you will know that you are not being negligent by allowing her to stuff her face with snacks and get obese.

SENSummer · 09/08/2026 20:02

A diet is completely unreasonable at her age.
I have a 5yo DD and I’ve previously had quite serious ED’s so I’m incredibly invested and well read on handling this in the healthiest way.

I would encourage conversations and actions surrounding ‘health’ avoid any trigger words like ‘weight’ or ‘fat’ etc. Do not weigh her or make the loss of weight a goal. Talk about ‘healthy’ and ‘strong’ and about feeling good inside and out. Lead by example, cooking and eating healthy food options but do not set it out as ‘good’ or ‘bad’ food just set it out as ‘moderation’.
Get out and about, get active and let it work naturally.

If you set up her self esteem at this age to revolve around weight and scales it will scar her for life. My DD eats a fair amount of treats (we both have a sweet tooth) but we do a huge amount of exercise and make a lot of healthy meal choices too. Both of us are strong, slim and athletic.

I’ve been ‘very skinny’ and it sucks. I’ve been grossly overweight and it also sucks. ‘HEALTHY’ and ‘STRONG’

I ask my DD ‘what do you think super girl eats for lunch?’ We make superfoods together.

MeridaBrave · 09/08/2026 20:01

Difficult at that age. Provide healthy food and lots of movement. Not much else is appropriate. Her father could mention to his ex but she is likely to be defensive.

PeloMom · 09/08/2026 20:00

What @MarthaLovesLaughing said. And BMI for kids is not a reasonable measure at all.

MarthaLovesLaughing · 09/08/2026 19:58

Healthy food, lots of fun exercise. No talk of diet or weight. Lead by example

Victorius19 · 09/08/2026 19:55

She's being set up for lifetime of health issues if she is allowed to carry on gaining weight like this. I would remove any high fat/calorie snacks from the house, make healthy meals and get her as active as you can. Poor kid.

ShetlandishMum · 09/08/2026 19:52

Leave it to her parents.

Sauceandwhizz · 09/08/2026 19:50

It's not unreasonable to be concerned about her weight and want to help.

But, it very much depends why it has happened in the first place, how you go about it and whether it can be maintained once she isn't with you.

It could be very confusing and damaging for her otherwise.

orangefoxsoda · 09/08/2026 19:46

DSD lives overseas with her mother, so she's with us for longer school holidays. DP will also try to go out there to see her a few times throughout the school year, but she's normally still staying with her mum during those visits. The longest we ever have her for at a time is the summer.

OP posts:
Poppasocks · 09/08/2026 19:45

Tricky. But I wouldn't go in with "diet" maybe just promote as healthy eating as possible, still allow occasional treats, watch portion control and as you rightly say, get active! Especially while weather is still nice :)

Fluffybuns88 · 09/08/2026 19:44

Unreasonable to put her on a diet yes.
Not unreasonable to give lots of opportunities for healthy meals and activities, it's really important you foster healthy eating habits in a non forceful or restrictive way.

OneNaiceSnail · 09/08/2026 19:42

How often is she with her dad?

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