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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Sister went nuts over a cup of coffee

509 replies

CrashBambiCoot · 24/08/2025 14:19

my sister visits my house around 3 times a week. Every time she comes she takes the piss out of my coffee calling it “half a cup of coffee” etc

She last visited Friday where I made her a coffee and she snapped “oh come on, fill it up for fucks sake” saying I’d only half filled the mug (I hadn’t).

This morning she turns up. I make coffee, as I was taking it into the living room she looks into the mugs and screams “half a cup of coffee”. I snap back “I don’t fill it to the top so it doesn’t get spilled! Nobody fills coffee right to the top” so she started dancing around me acting crazy shouting “ooo don’t spill it” etc before suddenly lunging at me and shouting in my face - coffee got spilt.

Now I’ve said I’m not making her coffee anymore. That’s it. Sick of the piss taking and ranting and raving. DH witnessed all this and basically joined in with her. She’s 42, DH is 50.

its not normal to fill coffee right to the top is it??? And the hysterics is certainly not normal is it?

OP posts:
LoveWine123 · 24/08/2025 17:12

Your sister sounds a bit nuts but I can see why she went a bit crazy if she asked you to fill her cup to the top and you kept doing what you thought was best for HER coffee. You kept doing it on purpose so she just reacted after getting fed up with you.

BunnyLake · 24/08/2025 17:15

LoveWine123 · 24/08/2025 17:12

Your sister sounds a bit nuts but I can see why she went a bit crazy if she asked you to fill her cup to the top and you kept doing what you thought was best for HER coffee. You kept doing it on purpose so she just reacted after getting fed up with you.

Then just make your own coffee or go in the kitchen and fill it up yourself. No one should be behaving like an unregulated toddler over a beverage not made to your liking.

bumbaloo · 24/08/2025 17:17

XDownwiththissortofthingX · 24/08/2025 16:57

Entitled? No, but as the post you've quoted makes clear, if it happened repeatedly then yes, it would be perfectly understandable for someone to eventually get sick of it and lose their temper.

Really it’s not normal at all to lose your temper over the level of your drink

that is the epitome of not normal.

What is normal is just to accept that when you go to Xs house you’ll get coffee lower in the cup than at yours. If you are losing your temper over this and screaming in people’s face you need to question why you are getting so worked up over such a triviality and consider talking to someone about your disregulation.

Next thing you’ll be trying to tell us it’s normal to punch your neighbour because they keep parking outside your house

JustGettingStarted · 24/08/2025 17:19

bumbaloo · 24/08/2025 17:17

Really it’s not normal at all to lose your temper over the level of your drink

that is the epitome of not normal.

What is normal is just to accept that when you go to Xs house you’ll get coffee lower in the cup than at yours. If you are losing your temper over this and screaming in people’s face you need to question why you are getting so worked up over such a triviality and consider talking to someone about your disregulation.

Next thing you’ll be trying to tell us it’s normal to punch your neighbour because they keep parking outside your house

You mean it's not?

BUMCHEESE · 24/08/2025 17:19

GreenGodiva · 24/08/2025 14:33

It drives me crazy when people only do cups filled 1/2-2/3. If I wanted a tiny coffee I’d ask for a tiny coffee. If you are making a a drink, you fill the receptacle to about 10- 15mm from the rim ( unless there is a legitimate reason not to. I ask my DH for juice instead of coffee or tea, he brings me half a glass. He’d be bloody gutted if I made him a mini pizza for dinner instead of an actual adult meal but here I am supposed to be happy with half a drink.

Oh get over it.

I'd tell you - and OP's sister - to make your own bloody drinks if you're going to be that fussy.

LoveWine123 · 24/08/2025 17:19

BunnyLake · 24/08/2025 17:15

Then just make your own coffee or go in the kitchen and fill it up yourself. No one should be behaving like an unregulated toddler over a beverage not made to your liking.

So if you know your sister wants her coffee done a certain way, you would purposefully make it the opposite way because you think it shouldn’t be done your way? It’s a very simple request - fill up the cup to the top. There is no reason why you can make her what she requested other than to be spiteful on purpose. I find that very odd behaviour on OP’s side.

WickedElpheba · 24/08/2025 17:20

I don't know what you mean by "right to the top"

Take a photo

greengreyblue · 24/08/2025 17:21

I think you need to take a photo of your standard mug of coffee so we can judge .

namechanged221 · 24/08/2025 17:25

She sounds unhinged

thinklagoon · 24/08/2025 17:25

I’d rather a good 3/4 cup of coffee, and prefer a small tea, than the awful litres of hot drinks people seem to want to proffer – for a friend who prides herself on her Sports Direct supersize mugs but I don’t want pints and pints of tea! Small, hot, strong. However because I’m not insane like OP’s sister, I accept what I’m given.

Can you make a safely lukewarm one next time and throw it in her face like Mugato?

2boyzNosleep · 24/08/2025 17:27

Surely this is a joke thread? Surely you would have noticed if you make your hot drinks differently to others?

Her reaction and DH is unacceptable.....

I would like to see a picture of how you usually make a cup of tea/coffee. For both of them to take the piss then maybe they have a point (but should just decline).

A family member of mine only fills the mug up about 2/3rds. Bloody annoying and pointless, I just decline.

BeRarePearlJoker · 24/08/2025 17:28

Gowlett · 24/08/2025 14:23

Glad it’s not just me! Solidarity, OP.

DH fills tea up, leaves the teabag in.

Then adds milk… Tea all over the counter.

Then spills it on the floor / coffee table.

I always tip some out when I catch him!

Also fills kettle to the max for one cuppa…

I fill the kettle to top for one cup.

BeltaLodaLife · 24/08/2025 17:30

BeRarePearlJoker · 24/08/2025 17:28

I fill the kettle to top for one cup.

Why? Why do you do that? It’s such a simple way to save on energy. Takes no effort whatsoever. Have you not been told since childhood to only boil the water you need?

There are some changes which are hard to do. But boiling a full kettle for one bloody cup of tea is something which is really easy to stop doing.

Mumof2heroes · 24/08/2025 17:31

GreenGodiva · 24/08/2025 14:33

It drives me crazy when people only do cups filled 1/2-2/3. If I wanted a tiny coffee I’d ask for a tiny coffee. If you are making a a drink, you fill the receptacle to about 10- 15mm from the rim ( unless there is a legitimate reason not to. I ask my DH for juice instead of coffee or tea, he brings me half a glass. He’d be bloody gutted if I made him a mini pizza for dinner instead of an actual adult meal but here I am supposed to be happy with half a drink.

Are you the sister?

XDownwiththissortofthingX · 24/08/2025 17:32

bumbaloo · 24/08/2025 17:17

Really it’s not normal at all to lose your temper over the level of your drink

that is the epitome of not normal.

What is normal is just to accept that when you go to Xs house you’ll get coffee lower in the cup than at yours. If you are losing your temper over this and screaming in people’s face you need to question why you are getting so worked up over such a triviality and consider talking to someone about your disregulation.

Next thing you’ll be trying to tell us it’s normal to punch your neighbour because they keep parking outside your house

Another one who apparently doesn't read posts fully.

XDownwiththissortofthingX · 24/08/2025 17:33

BunnyLake · 24/08/2025 17:06

You said if you had no choice but to accept. If you refuse the offer how can they be wearing the contents? So the only way they can do that is if you accept the offer of coffee then throw a hissy fit.

Do you understand what "hypothetical scenario" means?

BunnyLake · 24/08/2025 17:35

LoveWine123 · 24/08/2025 17:19

So if you know your sister wants her coffee done a certain way, you would purposefully make it the opposite way because you think it shouldn’t be done your way? It’s a very simple request - fill up the cup to the top. There is no reason why you can make her what she requested other than to be spiteful on purpose. I find that very odd behaviour on OP’s side.

She’s not ‘making’ it a certain way she’s just not filling the cup up. I’m not saying she’s right to do that but there’s no need for a grown woman to start acting ‘crazy’ and scream and dance around like some kind of Rumplestiltskin.

Jackreacherstrousers · 24/08/2025 17:36

I can't believe the number of people who have said they wouldn't have her back in the house.....really?.....it sounds like siblings bantering to me.
My husband often joins in our family wisecracks, sometimes on my sister's side, sometimes on my brothers, occasionally he sides with me. Do any of us die in a ditch about it?.....Do we fuck!🤦‍♀️

AMurderofMurderingCrows · 24/08/2025 17:36

Am I the only one gobsmacked at there being 9 pages of replies to this?

What the fuck? 😂

LoveWine123 · 24/08/2025 17:39

BunnyLake · 24/08/2025 17:35

She’s not ‘making’ it a certain way she’s just not filling the cup up. I’m not saying she’s right to do that but there’s no need for a grown woman to start acting ‘crazy’ and scream and dance around like some kind of Rumplestiltskin.

There is no reason for OP not to fill up the cup. Her sister didn’t kick off because of the coffee, she kicked off because of her sister being spiteful.

BunnyLake · 24/08/2025 17:40

XDownwiththissortofthingX · 24/08/2025 17:33

Do you understand what "hypothetical scenario" means?

You said the other person would be wearing the contents of the cup. It doesn’t matter that it’s hypothetical. You are still saying what behaviour you would do in this ‘hypothetical’ situation.

BeltaLodaLife · 24/08/2025 17:40

AMurderofMurderingCrows · 24/08/2025 17:36

Am I the only one gobsmacked at there being 9 pages of replies to this?

What the fuck? 😂

I think everyone is posting as they’re all waiting for the photo a this cup of coffee!

Lifestooshort6591 · 24/08/2025 17:41

This is daft, petty nonsense. I think you are probably seeing too much of each other. You know the saying 'familiarity breeds contempt'. DH should not have joined in though.

Plastictreees · 24/08/2025 17:43

… and now the OP is being deliberately spiteful apparantly, by not filling the cup to the brim 😂this thread is bat shit. Some posters seem like exceptionally hard work!

cariadlet · 24/08/2025 17:44

AMurderofMurderingCrows · 24/08/2025 17:36

Am I the only one gobsmacked at there being 9 pages of replies to this?

What the fuck? 😂

And yet here you are, posting a reply and making the thread even longer.