Question about visitors

I came across a post that said you can actually tell your nurse or the one at the front desk that you don't want any visitors until you "ok" it so that way no uninvited people will be able to come in. Okay so what about if I inform them about this but my husband is not on the same terms as me. What if my husband comes in with someone ? Will they let the other person in just because he's the father ? I'm referring to his mother and sister. He did this last time, left me and went to eat with his mom and when I told him they told me it was time to push he came in with his mom. Two nurses had asked who I wanted during labor I said only my husband and one of them asked me again when she saw my husband come in with his mom I told her only my husband and he said out loud "no my mom wants to be here too" I annoyingly said ok whatever to not cause an argument, I was starving, thirsty, and exhausted and all I wanted to do was get my baby out. His mom being there totally ruined my husband and I's "special moment" things all went downhill between us from there (my baby was fine)my husband chose to still be with me, and moved back into our house a week later. I'm getting induced this Tuesday coming up and i'm really scared of this happening again. I'm not the type of person to always stand up for myself which I hate, I just can't be mean, :( even though deep down inside I feel like making a scene or going off on a person. I was so happy that with this pregnancy my husband was discreet about it but now i'm worried because his dad texted him today asking how I was feeling and my husband told him about my induction. Now that they know about it i'm afraid his mom and sister will try to come his sister came last time but luckily she left the hospital the next day and missed my birth. He promised me things will be different this time and that it will only be us but he totally went against the whole "just us" thing with my 1st child. His family hasn't even tried to talk to us but since they know my due date is around the corner they all of a sudden are concerned . Can I just type a letter and hand it to the girl at the front desk ? My husband is the type of guy that can't say no to his mom