Mother in law at birth

My mother in law has asked me if she could be at the birth. I'm close to her and understand that she is so excited about the arrival of her grandson but I just can't bare the thought of having an audience whilst I'm naked, legs spread and panting like a wild animal.
I'm having my husband and my own mum in there with me and I will even feel a bashful in front of my own mum let alone anyone else. I want to feel comfortable to strip off and be in a quiet private environment while giving birth. Do you think I'm being unfair? Should I just let her be there?