Fully prepared to be told IABU here, as I'm not sure...I have a 3yr old DD and an 8mo DS. PILs very kindly used to mind my DD one day a week before DS came along and I took ML.
They have continued to have DD occasionally during the week to give me a break and for her to spend time with her 3 year old cousin (SIL's DD) who they look after 3 afternoons a week. She gets on well with her cousin and I think they find it easier with the 2 of them as they entertain each other. They have babysat at weekends for us a couple of times when we've been out too. All of which I greatly appreciate.
I am going back to work 4 days a week in March and we raised the question with them of whether they would be willing to look after both DCs one day a week (making it clear there was absolutely no pressure, DD is funded for nursery in the mornings now anyway and my DM is happy to have them every day, picking DD up from nursery each day). They have said having both would be too much for them (totally understandable). But they still want to have DD one day a week.
AIBU to think it would be unfair on my DS if they only look after DD? I know he's too young to understand but I am very paranoid about favouritism due to issues from my own childhood. Also it feels a little bit like they want DD there as a playmate for her cousin and not as a person in her own right if that makes sense? (They only want to mind her on the days when they have her cousin too - personally I would think a 10mo and a 3yo would be easier than two 3yo's tbh!) Am I being daft? I don't want to appear ungrateful.
Also it would make drop off and pick up more complicated as we would have to go to PIL's for DD and my DM's for DS, making a long day even longer. But is it churlish of me to say no?
By the way I know I am totally lucky to have 2 sets of grandparents around for my DCs and any childcare being offered at all - which is why I feel a bit of a twat for feeling upset out it, but I just can't shake that feeling of unfairness on DS's behalf.