I'm not sure annoyed is the right word but it feels unfair somehow.
My grandmother used to take me on a lot of lovely days out, she even took each of the grandkids (seven in total - not all my mums) on a 10 day foreign holiday each, and she babysat regularly so mum could go out in the evening. She also paid for me to go on a couple of holiday clubs for a week long each so my mum could get a break.
My mum didn't work and still doesn't. My dad isn't around but she has a partner. I run a business from home which I struggle to juggle around the kids every school holidays.
I just rang her and begged her to please take my youngest for a couple of hours because I need to get some work done after taking them on three expensive days out and she grudgingly agreed but said "she'll have to just come along with what we're doing though" and listed a couple of hobby-based things she has to do and some shopping (obviously, I don't expect her to drop everything last minute)
AIBU to think it would be nice if my mum offered to take the kids on a nice day out somewhere? she must know she benefitted from her own mum doing it for her? It kind of hurts that she won't think to do it for mine. Money isn't an issue but even so, a nice day out in a park is free.