Sister went nuts over a cup of coffee

We need a photo. I’ve seen some shit half cups in my time

I expect this is hyperbole from the OP. 'Screaming in her face' sounds unlikely behaviour from an adult

Op obviously makes ridiculously small coffees. This must be the case or her sister, who has commented repeatedly about wanting a properly full cup, and her own husband wouldn't have been united on this.

Your sister sounds mentally ill

She doesn't sound quite right in the head..And she sounds like a bully

Because I don't want two underfilled cups, I want one proper cup.

What a rude and horrible person.
Don't make her a drink , don't invite her round , what a cow.

But tipping it out when you’ve made it is really odd. Can you not just tell her you want it stronger? Seems very aggressive of her to sweep in and tip most out.

It’s an espresso.

They are pretty strong so I don't need much in terms of volume. Quality over quantity, any time!

Pub's just the other side of the river. They know how to make tea and coffee - we decided it was easier to just drink water afterwards, as she's not going to suddenly get the hang of making tea differently now.

I don't. I know how far to fill the coffee grinder to make either a large or small pot of coffee.

I live and breathe hot drinks - multiple a day.
Coffee, tea, herbal teas... must be a fishbowl sized mug at home but I would not expect anyone to cater out of their norms for me. I smile and lovingly appreciate what I'm given and perhaps ask for more shortly after.

What unhinged behaviour.

This thread… ‘I expect this….’ And ‘I expect that…’ When you’re at someone else’s house, you politely accept what you are given (having said what your preferences are with regards to milk and sugar.) If you are given a thimbleful of Mellow Birds, or a bucket of that dishwater pictured upthread, then that’s what you drink. Then after the visit, you go home and have your drink the way you ‘expect’ it.

However, OPs situation is different I think because of the frequency of the visits and the regularity of the request for more coffee. OP - your sister has no manners, and neither do you. Your sister has no manners because she is deranged, and you have no manners because she visits you three times a week and you have never accepted that this is clearly a huge issue for her and just poured in a little bit more coffee to pacify her. When you were children, did one of you always ‘win’? Why are you both trying to ‘win’ now?

you are at home FFS, just have a second cup!

I thought the same.

That is literally half a cup of coffee. I'm not exaggerating for comic effect - if you put a ruler in that, the level would be half the height of the cup. Please explain?
Fixed typo

As far as I’m concerned, @CrashBambiCoot, it is normal to fill a coffee cup/mug to about 1-1.5cm from the brim. And as a caffeine addict, I want as much of the life-giving liquid as possible. But there is no way I’d be rude like your SIL if I felt my coffee wasn’t full enough - she was a rude mare.

Could you get a bigger mug, so you don’t have to fill it too full, but she is still getting lots of coffee?

Did you not just re-make it? I’d have gone mad if she tipped it out to make it her way. Surely politeness dictates that you allow people to drink tea how they want it?

You've not met my MIL.

Lovely lady, an all round good person - but, oh my Christ, the tea she makes is absolutely foul. It starts with whatever was the cheapest teabags in the supermarket, then the bag of dust and sadness has about 2 inches of water applied and then another inch of skimmed milk about 3 seconds later, leaving at least an inch of air between the rim and the puddle of desolation at the bottom.

We took our own teabags last time we visited and DP insisted upon making her a tea (her preferred way for her tea, our preferred strong-tea-and-wave-the-milk-at-it-from-across-the-kitchen with a full cup). Before he'd finished, she'd swept in, seen our cups, grabbed them off the countertop and poured most of it down the sink to add milk to just over the 5/8ths level.

Coffee was coffee, hot water. Not great, needed more coffee, a better coffee and more hot water, but at least it couldn't turn into the abomination that is the lovely MIL's disgusting dishwater tea.

Tell her to bring her own in future. Simple solution. Bigger issue is your Dh hanging up with her, feels like bullying. I’d be having serious words with him, wtf was he thinking? It was extremely immature of him.

Honestly, you both sound incredibly juvenile. I love to have a laugh and I’m extremely laid back but that’s just childish. Especially your sis

My coffees are usually like this 😊 though I will ask people what type they want and supply something a bit larger. I don't have those massive grande cups or mugs that some people/cafés have though.

Quite. Mental health issues.

Just out of interest how full is it?

Anyone who gets that pent up over the level of a coffee has issues.