I've missed.lost of the conversation but @Gummybearmum YANBU
I hate the idea of my mum going on my room, and I'm 45. This also stems from a complete lack of privacy growing up. She used to go into my room when I was a teenager and search for something, anything she could get annoyed with. She would search my school bag for notes to or from friends and use it as some weird evidence of how awful I was as a person.
A few years ago she found Some shoe boxes I had saved things in when I was a teenager, including diaries. I had no idea they still existed. She read them. And took many opportunities to rip me apart because of something I'd written when I was 14.
She reads post addressed to me to my own address and given the opportunity will snoopy in my childrens' rooms too.
It makes me feel unwell, like she is crawling all over any private thoughts or belongings. And I don't even have anything remotely unpleasant or... personal anywhere. She just needs to know everything. It's like she's constantly trying to get into my thoughts and find out that either I hate her or that I'm a bad person.
I think some people just don't really get it, unless they've had this experience.
I'm sure you've had plenty advice, but I'd probably keep the bedroom door shut. And say she doesn't need to do any housework, she's there to spend time having fun with her grandchild, and no other expectations of her.
I do feel for you.