I know I will probably get flamed here and I know I'm probably being unreasonable so I just need a bit of perspective really.
MIL comes to stay once a month for about 3 days. She's a nice lady, albeit with the usual minor MIL annoyances. I find her a bit grabby with DC, wants to help but only on her terms etc, but whatever, it's nothing major.
The issue is that I'm not brilliant having guests. I work at home plus really like my own space. DH has given MIL a set of keys and she now just lets herself in whenever she comes down. I know this is very petty of me, but for some reason it annoys me. I like feeling in control of my own space (realise this makes me sound like a highly strung maniac, but not IRL, honest) and my own mum and dad who I'm really close to don't just let themselves in.
I can see that there's no real harm in her doing this, but it just grates on me and adds to a sense of entitlement that I suspect she might already have.
Perspective please!