In laws

How do you ladies deal with in laws that want to be a part of every thing during the birth. As some background, my husband has a sister that is older and probably not going to have kids. His parents have made comments several times about them worrying we are always going to prefer my family over them. 
It's just getting annoying because I feel like during those first few weeks I want my mom with me to help me, but not his. This is only because I know I will be very emotional and I just don't want to have to hide my emotions or tip toe around her feelings. It's ok if they are there too for a little bit, but i don't always want to split everything equally between our families.
Hubby thinks I'm depriving her of being with their first grandchild, and doesnt see my POV.
Ugh, anyone have any thoughts?