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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to feel undermined by my mother-in-law over the children?

107 replies

Cherrytree696 · 16/08/2026 22:48

I would really love advice/insight from mothers in law (particularly those who have sons married to daughters).

I often feel like my mother in law goes out of her way to go against my wishes. I express them and they seem to be clear but then she goes against them. For example, I had wanted to buy my son a bike for his birthday and told her this but then she bought him the bike and gave it to him before his birthday. More recently, my daughter was told she wasn't allowed cake after dinner because it was too close to bedtime but my mother in law said "grandmas rules" and gave her a piece anyway.

My husband falls out with her and tells her no all the time. To be honest I try to stay out of it because I'm a people pleaser and I grit my teeth a lot. I also know that if I say something then it will cause a fall out and it's not my family to fall out with.

I feel really lost as to what to do. I've started to pull away and only let my husband take the kids but that makes me sad. We used to have a really good relationship but I would say it went downhill after we got engaged and I wanted a small low key wedding (we were paying so we kept it small- no money was offered from either my parents or his).

Am I being unreasonable to worry about this? Be sad about this? Be angry about this? I'm currently crying as I right this but it's just so draining!

Thanks!

OP posts:
2O26 · 18/08/2026 00:39

Runssometimes · 18/08/2026 00:10

@thepariscrimefiles no she lied about it. His cousin was there too and she’s a bit older and wanted chicken korma. I knew something was up by the way MIL was acting and kept telling me how many potatoes DS has eaten, I’d left veggie shepherds pie made with lentils and veg so much more nutritious. I wouldn’t have given him just potatoes for dinner. Then I spotted two bowls in the sink with chicken korma sauce on. And then the cousin when MIL was out of the room told me that he’d had the same as her but she wasn’t supposed to tell me.

I never confronted her. But the same woman cut her first grandchild’s hair for the first time when her parents were out. Didn’t ask them. SIL was furious. And also kept telling my sister who would look after DS to give him chicken. She was convinced he was being starved being veggie even though I was really careful about nutrition. My Mum had reservations about him being veggie at first but just talked to me and never went behind my back. She was happy when I explained how I was making sure he had everything he needed and clearly he was growing up fine.

MIL is generally quite convinced she knows better than everyone and did have the granny’s rules thing. She also was always on about him
getting a tan and he got his first ever sunburn under her care when he was 13. I was furious. Her other grandkids were allowed go on sunny holidays with her but because I didn’t trust her I never allowed DS and turns out I was right. I deal with her in small doses now. And DS can now advocate and take care of himself much better so I’m less worried.

@Runssometimes Your MIL sounds so awful. Feeding your vegetarian child meat, cutting her grandchild's hair, and sending your DS out in the sun without sunscreen so he ended up with a sunburn—I am so angry for you!

Iyamnotayam · 18/08/2026 01:03

OP, I feel for you. My situation is a bit different because it's my own mum and dad that are the problematic grandparents who undermine me.

They used to have a real thing against DD having a car seat because it ruined the aesthetic of their sports cars they didn't think she needed one. It got to the point where I ended up telling them that if there's an issue with the car seat, then DH and I can stay over as well and drive DD everywhere separately.

Then DD was diagnosed with Irlens Syndrome, and needed a blue overlay. Because she was only young and has SEND we got her specialist tinted glasses instead. My dad actively told DD that the optician didn't tell her she needed those glasses and I'm just being silly. And he used to constantly discourage DD from wearing them. That caused a mega argument.

Now the latest thing is bed time. For various reasons DD can't cope with late nights. My mum would let her stay up until past 11, despite her weekend bedtime being 9. And then on Sunday DD would come home, and DD, me, DH and school would have to suffer the consequences of her late nights at my mum's. When I brought it up my mum told me I always find something negative when she's with DD (not true), and told me I can't control what DD does when she's at hers.

I've discretely reduced sleepovers to dates when a late night isn't going to ruin the entire week.

My parents adore DD and vice versa, I have a decent relationship with them too. But being undermined, and then then getting offended about boundaries is SO exhausting.

Credittocress · 18/08/2026 02:44

TheyGrewUp · 16/08/2026 23:43

Hmm. I'm a MIL and have a DIL and a baby GD whom I haven't yet met because they are thousands of miles away.

To summarise you are upset because your MIL bought her GS a bicycle (you were planning to), gave your dd a piece of cake too close to bedtime and let her have a small toy before her birthday.

I wouldn't do those things but I don't think they're hills to die on. "Ooh come on Johnny, lets get you those snazzy trainers and flashing toy you want, because Grandma bought you the bike." Providing teeth were brushed after the cake, it isn't a big issue snd the Sylvanian Toy - well, it won't harm.

Your MIL is doing kind and generous things. If she were letting the DC run about naked, left them dirty, shouted at them or, heaven forbid, gave them a tap, I think you'd have cause for complaint.

What? Sugar just before bed and you’re trying to do a wind down?

Not a hill to die on is just saying be a doormat

Esperanza25 · 18/08/2026 07:37

Well, I’m a MIL and have sons and can tell you that I respect what my sons and DILS ask me to do, especially if it’s specific, like not giving a present before a birthday. I mean why would I, but anyway.
I do this because THEY are the child’s parents and I am not. This seems to work well because I have very good relationships with all of my children and partners.

2O26 · 18/08/2026 18:32

Credittocress · 18/08/2026 02:44

What? Sugar just before bed and you’re trying to do a wind down?

Not a hill to die on is just saying be a doormat

"Not a hill to die on is just saying be a doormat". I think the expression means "pick your battles". The MIL buying her a bicycle was very disrespectful.

MammaJ14 · 20/08/2026 04:02

your not being unreasonable, you mother in law has no boundaries and it happens a lot with mothers and sons. especially if her husband has died. they turn the son into a surrogate husband. they act like they are the main character and i am afraid if you are a quite people pleaser she will walk all over you. my advice you want to buy or do stuff for your kids (don't tell her what you have planned) so she cannot undermine you or take over (eg the bike situation) with the cake incident if that happened in your house then its your rules not hers. I am afraid the only way to deal with mother in laws like this is firm boundaries which she will fight against. believe me i am 25 years in with this and it only gets worse as they get older. wishing you the best of luck. your husband loves you, he obviously knows what his mother is like hence why he get annoyed at her, your kids love you. so just remember you don't need her approval what you and your partner decides stands. chat with hubby work out what you are both willing to accept and stand upto the woman

AllIneedAreMyFamilyandDogs · 20/08/2026 04:18

I'm a MIL. Your MIL is totally out of line. Getting the bike when you'd said you wanted to is just mean. She should be respecting the no sugar in the evenings rule for your children too. If the kids were in her care and staying the night, okay, maybe something you could choose to let go. I'd be having less time with grandma if mine behaved like this.

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