I have a good relationship with my mum, but this feels very familiar.
Having been brought up that discussing money was rude (we never had much anyway, mum was a single mum on a modest wage), mum has gone on to be utterly money obsessed.
She knows what everyone earns, how much everyone spends on their car, house, holiday etc.
I last revealed my salary to her 12 years ago. I then got a significant pay rise and felt I should keep my earnings to myself from that point on.
She's DESPERATE to understand what I earn. Sometimes she'll treat me like a low earner (desperately trying to push a £5 note into my hand, which I push straight back) and other times a high earner (casually asking if she can borrow £10k, when my husband had only just lost his job). Every time I share that I have a new job or promotion, she animatedly asks me "MORE MONEY??!" I always answer "Erm, sure".
She asks me the price of EVERYTHING. Even things she would never have an interest in buying. I evade giving a straight answer, so reply with "It wasnt too much" / "It was quite a bit" / "It was pretty reasonable" / "It doesn't really matter what it cost" etc.
She also tells me about other people's finances, I think in the desperate hope of getting a rise out of me. So she'll share a cousin's salary, but all she ever gets from me is "fair enough". I literally have zero interest in money and don't give a shit what others earn or spend, and I think it drives her crazy.
For anyone wondering why I'm so evasive, she would have STRONG opinions on my lifestyle and how I should be spending my money if she knew what I earned!