‘You’re at your auntie’s’ - what would you take that to mean?

[nootherplaceinthisworld]

Context, appointment with (not her actual job title) ‘support worker’ (a lot older than I am) in her office - she said something along lines of ‘you organise the coffee, you’re at your auntie’s now’ .

Lovely turn of phrase and I assume it means as I thought ie make yourself at home - have I got that right? Because that’s what I did …

I’m a bit crap with social cues at times - anxiety and various other things that have happened before that have left me struggling a bit . She’s really lovely and a huge and very valuable support just now but I’m crap at socialising (or I feel I am) and don’t want to make myself look stupid .

I've never heard this and it would have confused me dreadfully!

Whenever my mother told me earnestly that I was somewhere/doing something I wasn't, I usually took it to mean she'd lied to someone about my doings to make her own life easier and needed me to play along. So my first thought from the title was that you were being asked to lie for a parent 😂

I was always under the impression that eat as much as you want. "Make the most of it", your auntie is paying.

Uncle who came from Wolverhampton used to use it, as well. Make yourself at home was his explanation.