You need to find out how many hospital policy is first.
I had my Mother and MIL in there for the last 3 babies and also my 2 SILs, both of who will never have children. This last time my 9 year old son was in there too.
I kin dof think if you are comfortable with non-family members being in there you really need to think about inviting you mom and MIl because feeling will be hurt if you don't and you have to have those people in your life for ever, it isn't worth it. Besides you don't have to have them in there during the labor. I send everyone out but my Dh and this last time my closes SIL, who journaled the whole event for me, like a time line and then when it can time for pushing, everyone else come in.
They were quiet and repsectful and across the room and hardly even noticed, I was busy, lol!
Just think it through, it is a once in a life time experience and you at least need to invite your MIL if you are going to have non-family inthre, besides maybe she won't tak eyou up on it?