I don't mean to be disrespectful, but I truly do not understand these posts. No one gets a "say" in your birth. No one. It is entirely up to you and dh.
And speaking of your dh, he has NO IDEA how much pain you are about to be in, or he'd fully support your mother being there for support. My husband still says he will never forget feeling so helpless while I labored and how terrible he felt watching me cry out in pain (my epi failed and there was no time for another, plus dd was sunny side up and got stuck in my pelvis). Anyway, tell him to quit being a d*ck and realize that your entire woo-ha is about to be ripped to shreds, so he needs to be quiet and do what is best for you!
Tell your FIL to stop being creepy and wanting to see your vag get blown to smithereens. Ha. What a weirdo.
Also, take all the time alone with the baby that you want. You will never get to meet your baby for the first time every again, so take your time and keep everyone away. Besides, do they even realize that you will be getting sewn up during that time? It took them TWO HOURS to sew me up after only a level 2 tear.