Will try to keep this short but clear.
MIL and I have a pretty good relationship, she loves our 2 DDs and likes it when we go to see her (she lives up the road). She has mostly been quite helpful on the odd occasions that we have asked her to look after the children but we do not ask her very often. They are 4 and 6 years old.
MIL has just recently retired - she is quite young, fit and healthy and very active. I work from home and often find it difficult (and stressful) to fit everything in around the children. DH works long hours but we share childcare evenly when he is around.
DH thinks now retired MIL could/should help us out by having the children say one day a week. (We are in France where it is common for GPs to look after children quite a lot). MIL says she doesn't want to get into a fixed routine as she is very busy (she cleans her house a lot and has a big garden).
I have asked her a few times to help me out for a couple of hours and she does when she can but equally often says no.
So, after all that - DH thinks I should be phoning her at the beginning of the week to sort out when she can have the children in order to get her into a bit of a routine of helping. I would find this utterly excruciating to do as she clearly doesn't want to look after the DCs too much. I do call her when I'm stuck but I am utterly unwilling to try to force some sort of arrangement on her.
DH thinks I'm being a woos and have no right to stress over childcare if I'm not going to do this. We don't really have any other help apart from limited help from a child minder (money a bit tight too).
So AIBU to disagree with DH and think that if he thinks MIL should have the kids once a week on principle then he needs to take her to task over it even though it would help me out?