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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:
thinklagoon · 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? 😂

It’s the perfect Sunday night zero-stakes thread in which to get DEEPLY invested. Give it a few more pages and we should see some deleted posts. 🍿 ☕️

LoveWine123 · 24/08/2025 17:45

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!

It a slow Sunday evening where I am…we are all here for the entertainment after all 😆

whistlesandbells · 24/08/2025 17:47

WhereIsMyJumper · 24/08/2025 14:45

I don’t think it makes a blind bit of difference if you’re right about not filling the coffee to the top or not. What does matter is your sister treating you like shit in your own house after you’ve just made her a drink and your DH joining in…

💯

AMurderofMurderingCrows · 24/08/2025 17:48

cariadlet · 24/08/2025 17:44

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

Very true 😂

Someone2025 · 24/08/2025 17:55

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?

Your sister is a bitch who has anger issues and your husband is a stupid clown of a man

FrangipaniBlue · 24/08/2025 17:55

None of us can judge without side by side photos of how you make one and how your DSIS would make one…….

so for that YABU 🤣

CarterBeatsTheDevil · 24/08/2025 17:57

Absentmindedsmile · 24/08/2025 14:33

None of this is normal

I agree with this. I don't think I would make someone spill coffee to prove a point about not filling the cup up, but it does always really annoy me when I get given a tiny coffee, especially as people who serve tiny coffees for some reason also never put enough milk in.

CarterBeatsTheDevil · 24/08/2025 17:58

A hot drink really doesn't look right to me unless the cup's full. It always makes me think the server didn't boil enough water.

It turns out that I have strong feelings on this topic

Sam9769 · 24/08/2025 17:59

Tell your sister to F off!

DyslexicPoster · 24/08/2025 18:01

MN never fails to shock me at how rude some people's "loved ones are" even my enemy's are less cruel.

Fill it to the brim on a saucer and hand it other. If she says it will spill just say "don't be so fucking ridulous and hysterical. Like that's even a thing".

Your sister is unhinged and I struggle to belive family act like this and it tolerated. Unbelievable.

Someone2025 · 24/08/2025 18:05

Arlanymor · 24/08/2025 14:28

Why did your sister and your husband behave like a pair of goady bullies?

That's appalling.

I wouldn't want to see someone who treated me so awfully - and I certainly wouldn't continue to make her any refreshments.

Why did your sister and your husband behave like a pair of goady bullies?

that’s exactly what they were, I think they think the OP is a walkover, they wouldn’t have done it otherwise

IntoTheFringe · 24/08/2025 18:08

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

Filling a mug - normal.

Hysterics over a half filled mug - not normal.

Arlanymor · 24/08/2025 18:08

Someone2025 · 24/08/2025 18:05

Why did your sister and your husband behave like a pair of goady bullies?

that’s exactly what they were, I think they think the OP is a walkover, they wouldn’t have done it otherwise

Sadly I think you are absolutely right.

cariadlet · 24/08/2025 18:14

Someone2025 · 24/08/2025 18:05

Why did your sister and your husband behave like a pair of goady bullies?

that’s exactly what they were, I think they think the OP is a walkover, they wouldn’t have done it otherwise

The OP sounds anything but a walkover. If she was easily pushed around, she wouldn't have refused the SIL's repeated requests for a full mug of coffee. Someone who treats other adults like children who can't be trusted not to spill their drinks is hardly a pushover.

Tinytimmy123 · 24/08/2025 18:17

I have recently changed coffee machine, new one spits out about 3 mls of coffee so I have to hit the button a few times to get a decent cup but still not even half way full. The other coffee machine did it one go, so I'm going back to the original coffee machine.

If it's an instant coffee thing I would hate a little cup of coffee but it is unreasonable to expect it to be filled to the rim for the reason you say.

BUT if I went to a coffee house I would expect a decent fully filled cup of coffee, I would want my moneys worth, spill risk or not.
So depends on the circumstances.

Someone2025 · 24/08/2025 18:20

cariadlet · 24/08/2025 18:14

The OP sounds anything but a walkover. If she was easily pushed around, she wouldn't have refused the SIL's repeated requests for a full mug of coffee. Someone who treats other adults like children who can't be trusted not to spill their drinks is hardly a pushover.

I disagree, if they respected her and thought she wouldn’t tolerate their behaviour they wouldn’t have said anything….bullies only bully people that they think they can, they never try it on people who they think will fight back

AngelicKaty · 24/08/2025 18:23

TomatoSandwiches · 24/08/2025 14:25

Get her a sippy cup just for your house, silly cow.

LOVE this idea! 😂Definitely do this OP - and as you hand it to DS say, "there's your full f*cking cup!"

PurpleChrayn · 24/08/2025 18:26

In my house this is called an “Auntie Pat” in homage to an aunt who always filled a cup about halfway.

Your sister sounds like a bit of a knob.

Blanknotebook · 24/08/2025 18:28

They both sound like a pair of twats. Tell to make their own bloody drinks in future.

Fluffy40 · 24/08/2025 18:29

I don’t fill mine up, I like a good dose of milk and sugar to make it drinkable!

and I’m a clumsy old sod.

Grammarnut · 24/08/2025 18:36

I don't fill to the top. About half an inch below rim. And I pour out the extra if it is too high. Tell your S not come round any more and tell your DH a) make your own coffee, b) sleep in the spare room until you apologise (with chocolates, flowers and expensive outing of your choice, OP) for such juvenile behaviour - your acceptance of apology does not include reinstatement of cups of coffee for the twit.

Mary28 · 24/08/2025 18:36

Your sister is rude. This is sibling stuff. Your DH is a toolbag for taking her side.
Get them to make their own coffee from now on. If she's there 3 times a week she should be making it herself anyway.

Squirrelsnut · 24/08/2025 18:42

I'm astonished at the amount of replies saying that they also dislike an unfilled cup, as if it excuses the arseholery of your DSis and DH!
Baffling. Do people really care this much about hot drinks?

PlayingDevilsAdvocateisinteresting · 24/08/2025 18:50

MaryGreenhill · 24/08/2025 14:26

They didn't treat you very nicely @CrashBambiCoot . I would never make another cup of anything for her nor your DH . Let them stew .

They were having coffee, not tea @MaryGreenhill 😜

But in all seriousness, the sister is probably more to be pìtied, than angry at, for her ignorant behaviour.

However, @CrashBambiCoot's husband was just being vile. Depending on whether being vile was an extremely unusual thing for him to be, or whether it is such normal behaviour nowadays that the OP only just registered it, would affect how I would proceed - if logistically possible.

If his behaviour was so unusual that the OP was struggling to believe that it was her husband that was saying those things, then later on, when they were on their own, and everything had calmed down, I think that she should sit down with him, with no distractions, and ask him why he had behaved in such a way. The OP would obviously then have to decide whether his explanation made any sense to her, and was in any way something that she could forgive in the right circumstances.

On the other hand, if his response has become what the OP has realised is his normal type of behaviour these days, then if she thinks that she may still have some positive feelings towards him, she should maybe ask him to come to couple counselling with her, and if he refuses, or if the OP knows that she no longer loves or needs him, then the answer is both straightforward, and obvious...

Mix56 · 24/08/2025 18:51

Just tell them both to make there own coffee from now on;
"Make your own, that way you won't need to be utterly fucking ridiculous about the way I make it."
or, "No more maid service & free coffee here."

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