So my parents are saddled blessed with 10 grandchildren of varying ages. For a while now it has been tradition for my folks to have each grandchild over for a sleepover on their birthday which the kids all really enjoy. My eldest 2 have birthdays a couple of weeks apart in January and so far have always had joint sleepovers. This year my mum seems to have forgotten about them completely though. She's had the birthday child prior to my 2 over to stay and is now planning the next birthday child's sleepover this weekend. I (and my kids) aren't particularly pushy sorts but when my mum first mentioned this I suggested that she could make it a joint sleepover with my 2 if she liked to 'kill 3 birds with 1 stone'. It was my clumsy way of hinting I suppose. She said she might just do that. A few days later and she's forgotten again and when I just spoke to her is back to planning this weekends sleepover with just the 1 birthday child.
I feel really upset. Daftly upset. My kdis are 5 and 7 so old enough to twig they may be missing out but not quite old enough to be guaranteed to point this out in front of their grandparents. Why is my mum passing them over like this? Should I just forget about it or keep hinting/asking until my parents invite them over?