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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:
Robin67 · 24/08/2025 16:38

Yeah, that bitch would not be visiting my house 3 x a week.

MrsTerryPratchett · 24/08/2025 16:39

KittytheHare · 24/08/2025 16:36

Yet another thread where the Op posts about a highly implausible scenario then disappears. Boring at this stage.

One Post Wonders.

Let’s see, it’s still early…

JudgeJ · 24/08/2025 16:39

LadyQuackBeth · 24/08/2025 14:47

It's the kind of stupid fall out that happens in families, normal probably lies halfway between how empty you're leaving it and how full she wants it.

Maybe get some bigger mugs/cups so you can give people more coffee without worrying about them being over full.

Or tell them to make their own coffee! My late OH loathed the wider than deep coffee cups often used in cafes etc and when ordering we asked for it not too be filled too near the top.

BunnyLake · 24/08/2025 16:40

KarmenPQZ · 24/08/2025 16:37

Haha. My parents love a half filled cup. Cos they’re in their 70s and not always so stable in their feet. And I always jokingly ask what happened to the other half if they make it. I always fill it right to the top. Usually 1mm. Slurp the first cm before I leave the kitchen so I don’t spill. Then take the rest to where ever I’m going to drink it. If someone makes me a cup I’d expect to 0.5-1cm from the top for sure.

My dad used to laugh and say ‘I see the tide’s gone out’. No sane adult behaves, or defends, how this woman behaves, dancing around and screaming in OP’s face.

XDownwiththissortofthingX · 24/08/2025 16:40

BunnyLake · 24/08/2025 16:37

Her sister is 42 not a child, her behaviour is extremely odd regardless of how much coffee is or isn’t in the cup. Would you behave the same way?

Depends how often you've handed me a half-full cup of coffee despite me reminding you every single time.

I'd give up long before that point and just say no to your offer of half a cup of coffee, but in a hypothetical situation where refusal isn't an option, then yes, eventually I'd lose my temper and you'd likely end up wearing your half cup of coffee.

ginasevern · 24/08/2025 16:41

XDownwiththissortofthingX · 24/08/2025 16:35

Aye, and if OP fills her cup properly for once then there will be no histrionics and everyone is happy.

I guess you're right. If filling a cup of coffee to the top stops her from behaving like an extra from "One Flew Over the Cuckoo's Nest" then that's obviously the way to go. I'd say she probably needs to get out more or even better, seek help. But you obviously don't find it remotely unhinged. Interesting.

BunnyLake · 24/08/2025 16:41

JudgeJ · 24/08/2025 16:39

Or tell them to make their own coffee! My late OH loathed the wider than deep coffee cups often used in cafes etc and when ordering we asked for it not too be filled too near the top.

They’re my favourite type of cup, I love a wide brimmed cup 😁 (sorry just realised he’s your late OH).

OVienna · 24/08/2025 16:46

She is bizarre.

BunnyLake · 24/08/2025 16:46

XDownwiththissortofthingX · 24/08/2025 16:40

Depends how often you've handed me a half-full cup of coffee despite me reminding you every single time.

I'd give up long before that point and just say no to your offer of half a cup of coffee, but in a hypothetical situation where refusal isn't an option, then yes, eventually I'd lose my temper and you'd likely end up wearing your half cup of coffee.

You’d lose your temper and they’d be wearing the contents? Wow, how strangely aggressive. So you’d lose your temper to a friend, a colleague? Or just a family member because you know outside of that you would look unhinged? Do you have many friends?

BunnyLake · 24/08/2025 16:48

OVienna · 24/08/2025 16:46

She is bizarre.

As is someone else on here. Who’d think a half filled cup of coffee you’re not even paying for would bring out such odd and unhinged behaviour.

ClafoutisSurprise · 24/08/2025 16:52

Well, this thread has been an eye opener! I generally fill up to about 2cm from the top, whether I

Lyocell · 24/08/2025 16:54

XDownwiththissortofthingX · 24/08/2025 16:40

Depends how often you've handed me a half-full cup of coffee despite me reminding you every single time.

I'd give up long before that point and just say no to your offer of half a cup of coffee, but in a hypothetical situation where refusal isn't an option, then yes, eventually I'd lose my temper and you'd likely end up wearing your half cup of coffee.

Really? You think you are entitled to throw a cup of coffee over someone because they haven’t made it how you like?

onceuponatimeinneverland · 24/08/2025 16:56

This whole scenario sounds mad (and slightly bullying behaviour from the pair of them - I bet they think they are hilarious). Restrict coffee drinking to the kitchen. Is she normally so opinionated/picky? Your DH sounds a delight as well.

If my granddad received a cup of tea with anything more than a 1cm gap at the top he would request a saw so that he could cut the top off the cup... Done in a jokey way and he'd get himself a top up if he wanted more without a song and dance.

For me I can only seem to drink half a cup of any hot drink, so the size of the cup and whether it's completely to the top or not is irrelevant to me as I'm only going to drink half of what's provided in any case. If it's full to the brim though I'm as likely as not to spill some of it on the counter/floor as I move.

MeadowMouse · 24/08/2025 16:56

This isn't about coffee. She sounds like an unpleasant, ungrateful guest. Three visits a week sounds like a nightmare. Can you stop inviting her and go to hers instead, but less? She needs to sort herself out, and your husband should be on your side. Sorry, sounds awful.

XDownwiththissortofthingX · 24/08/2025 16:57

Lyocell · 24/08/2025 16:54

Really? You think you are entitled to throw a cup of coffee over someone because they haven’t made it how you like?

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.

NoSoupForU · 24/08/2025 16:57

Yes, I expect a cup of coffee to be a full cup. I'm not a child and so I'm capable of holding and drinking from a cup. But if you feel so strongly then stop offering coffee.

XDownwiththissortofthingX · 24/08/2025 16:58

BunnyLake · 24/08/2025 16:46

You’d lose your temper and they’d be wearing the contents? Wow, how strangely aggressive. So you’d lose your temper to a friend, a colleague? Or just a family member because you know outside of that you would look unhinged? Do you have many friends?

Did you miss the "I'd refuse your offer" part entirely?

Butteredradish2 · 24/08/2025 17:01

She's your sister and visits several times a week, surely she knows where everything is?! She can make her own coffee by now.

But i must say, the OP made me laugh!!

BunnyLake · 24/08/2025 17:01

KittytheHare · 24/08/2025 16:36

Yet another thread where the Op posts about a highly implausible scenario then disappears. Boring at this stage.

Maybe they are starting a few threads. There’s another about an OP’s sister going through OP’s dh’s phone. One opening post then silence.

Edit: that one might be genuine

Spookyspaghetti · 24/08/2025 17:04

TomatoSandwiches · 24/08/2025 14:25

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

Yes, get some pass-agg personalised coffee thermos cups for DH and DSis. Act really genuinely overly concerned with their coffee comfort and remorseful. Basically, fight crazy with crazy as it’s the only way.

Side note; so odd your DH was supportive of that. On Mumsnet that would be an affair red flag.

I do make tea for myself I make just over half a cup as that is usually all I mange to drink before it goes cold. I’d fill it up for guests. I’d rather not spill hot tea on myself either so it still wouldn’t be right to the top. Maybe she can collect it herself from the kitchen, then it’s her problem. I hope they both apologise.

BunnyLake · 24/08/2025 17:06

XDownwiththissortofthingX · 24/08/2025 16:58

Did you miss the "I'd refuse your offer" part entirely?

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.

AtomHeartMotherOfGod · 24/08/2025 17:07

HoppingPavlova · 24/08/2025 14:22

What is your definition of right to the top? I would fill it/expect it to be filled to about 1.5cm below the rim of the cup, 2cm at absolute most. Filling it right to the very top so you had to sip it before you could move it would be odd though.

I agree with this. I fill it enough so I have to move slowly. If your coffee is a good 1-2 inches from the top I'd say that was weird.

Her and your DH's behaviour is poor though.

Lyocell · 24/08/2025 17:08

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.

No it’s not? It’s not understandable for anyone to lose their temper because they don’t like the way a drink is served. That’s mental.

BunnyLake · 24/08/2025 17:11

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.

That is aggressively weird. You think it’s ok to throw coffee over someone because they repeatedly didn’t follow your instruction? Are you actually ok (for real). Have you no understanding of how to behave?

Are you a ‘they made me do it’ type of person?

EH1768 · 24/08/2025 17:11

Filled or not filled is not the issue for me here. If a family member doesn’t like how a drink is made once, surely they should know that they just make it themselves the next time. DH and your sister are rude twits, and should be making everyone’s drinks!