My stock phrase, when anyone mistakes me for a childminder is: ‘In an emergency I’ll happily look after anyone’s child, but if I wanted to be a nanny I’d train as one.’ Seems to strike a balance between being helpful and not being treated as some sort of nanny McPhee.
I too would be unimpressed to have a potty-training toddler foisted onto me on a scorching heat when it’s my day off.
I do think though it’s not unusual for grannies to be totally besotted with their grandchildren, and perhaps somewhat blinded as a result. Worse ‘baby bores’ than the parents with endless photos and monologue about the latest achievement. Also not unusual for the mother-daughter relationship between granny and mother of child to be very close with tiny grandchild on the scene. Partly because nobody else can talk for 12 hrs solid about weaning.
I don’t think this necessarily means that your Mum is uninterested in you. Or that she loves you any less. I say that as someone who has been the auntie-that’s-not-wild-about-children who gets the sticky child plonked on their lap. It does hurt as it feels like a right royal ditching, but I know, having now had my own child, that it’s not that she didn’t love me, she was literally bowled over with the baby and wanted to see it at every. single. available. opportunity.
I think people telling you to cut her off is a bit hasty. You clearly love your mum and want her company. I bet she feels the same under all the baby obsessing.
I would phone her up and tell her you love seeing the neice but find it draining after a week at work so you’d like some input on when you help with childcare. And also that you were looking forward to catching up with her for a relaxing day because you miss her lately and that is difficult with a toddler around.
She might mistakenly be thinking that you will bond with the two year old over a day out in the blistering heat with a buggy and a potty in tow.... But you can set her straight on that one!!
Most of all — call your sister and explain. Between you, you can manage your mum. Tell her you are happy to help out when she is stuck, but that would appreciate not having whole days babysitting forced on you. Promise to return the favour when you have your kids and she is the one eagerly anticipating a spa day only to end up crawling around soft play!
Good luck.