Our first baby's due in a few weeks and DH has just told me that as soon as I go into labour, MIL is going to drive down (she lives a couple of hours away) and be on hand for if he "needs support" 
and also to drive us home afterwards and go shopping for anything we might need etc.
She doesn't want to actually be at the birth or anything, but I don't really want her to be at the hospital at all, I just want my own DM to be there and to be the one to help out in the first couple of days. I also really want my DM to be the first to see the baby and I don't know how that can happen if MIL is lurking about at the hospital during the birth. My DM can't drive so she'll be relying on buses, and I know that's what DH will say if I tell him I want her to be the one helping.
I don't know MIL well enough to have her around straight after the birth, AIBU to just want my own DM there? And how can I explain this to DH/MIL?
Also it's her first grandchild whereas my sisters have already had several kids so DH seems to think that it's somehow more important to MIL that to DM.