I don't know if this is the right section for this, but there are so many it could go in that I'm stumped 
My parents mind DD for two days a week, unpaid. I love that they do it, I'm delighted that they're so fond of her (and she of them), and so involved in her life. I don't want it to stop.
But I'm finding it a little hard to deal with the whole situation.
We've had disagreements lately about how DD should be dealt with (for instance, they insist that she shouldn't be allowed to put anything other than food or drink or a dodi in her mouth, whereas I think that an 18 month old is inevitably going to mouth things, and we should just make sure there's nothing dangerous or fragile within her reach).
When I stopped giving DD bottles during the day at a year, I gave them a sippy cup to give her but they kept giving bottles. No matter how many times I asked them to stop and my mum agreed to, my dad would end up admitting that they were still giving her bottles.
I don't much like the way they feed her, either; I know she's difficult to get food into, but they seem to resort to sliced fried potato every day and I'd prefer if she wasn't eating that sort of thing. Unfortunately she often won't eat the healthier options I provide, though, and they've decided that it's better for her to eat fried potato than nothing.
Mum has made a couple of digs lately about how they're the best of all DD's carers. For instance, she thinks it's great that she gets so much input from her grandparents because apparently we, and the creche workers she's with 3 days a week, don't interact with her (this really, really isn't true!); also, she was telling me how happy she was to bring DD out for two walks one day last week, because 'we're the only people who ever give her any fresh air' (we do take her out when we're home at the weekend, and the creche has an outdoor area which the kids use whenever it's not raining - the child is by no means kept indoors for 5 days a week!).
Mum also resents the creche and makes pointed comments about them all the time, that there's no way DD is really eating or napping for them and they must be lying in her logbook - I know this isn't true, aside from anything else the evidence is there in her nappies - you can't argue with those! I've no reason not to trust the creche, they have a fantastic reputation locally and I really like all the staff members, and DD is always delighted to be left there in the mornings. I have no reason to believe any of mum's claims are at all justified.
Finally (sorry, I'm terribly longwinded), I find that my parents are inclined to take over a bit when we're all together, as if they're her parents and we're not. So in our house, when we're there, they still enforce their rules about things like chewing, even when I try to stop them and tell them it's okay. And mum tends to refer to herself as 'mama' when talking to DD, and when DD is upset, will reach out to take her out of my arms.
The thing is, if I try to say anything to them about any of this, they get terribly offended; even asking mum not to call herself 'mama' gets me accused of overreacting. They're very, very over-sensitive about everything generally, but particularly anything related to DD, so I find I have to just put up with it. And while I can manage that now, I'm afraid that as DD gets older and we disagree about more serious issues, it won't be possible, so I'd like to start being a bit more assertive now (though gently!).
Any suggestions?!