help! my husband wants to include my * RANT* mother in law in baby names and she's getting controlling!

This is my husbands first baby, and his mothers first grandbaby. It's just him and his mom after his father passed away from cancer in 2004 and his younger brother passed away a little over a year ago. I love my mother in law I really do. And I'm not necessarily passing blame to her. She has a history of wanting to control things, where my husband is afraid to make decisions without running it by her first. So here's what's going on now, when we first announced our pregnancy to the family they of course asked what names we liked. This is my second baby, my oldest is 12 and I personally have learned to not tell people name ideas unless you want negative feedback. But my husband is so excited he was gushing the names we liked. So now his mom has one name for each gender stuck in her head and she thinks those are our final answers. And she likes them. So whenever I would hear another name and I asked my hubby if he liked it he would be quick to shut it down. I obviously knew why he didn't want to be open to other ideas. He has always felt more comfortable about his decisions as long as his mom approved. So just the other day I finally got him to be on the same page as me and pick out a couple names for each gender and narrow it down once we knew what we were having. I have tried so hard to ask him to keep the names we pick private since people can be negative and it's already so hard to decide on names as a couple without other friends or family members input. My 12 year old daughter, husband and myself were going through a book of baby names and stumbled across one we all LOVED. For the record my daughter has been so sweet and loves all the names we have chosen thus far. So the first thing my husband says after we all declared that we loved it which was Kai for a boy, was "I have to call my mom and see what she thinks!" I told him I didn't mind if he did that as long as he didn't leave it as a choice for her. Word it like "hey mom ! We have another name we might use if it's a boy and it's Kai!" Not "hey mom we kinda like this name what do you think?" So sure as shit, every time I mentioned the name after he spoke with her he seemed to change the subject and didn't show much interest anymore. When I asked what his mom thought he said she didn't like it and that he just wanted to stick with our first choice. Of course I was livid but the problem is she knew by telling him she didn't like it would make him not want to like it. And he admitted that. And when I say we're having a difficult time picking names, let me stress it's EXTREMELY DIFFICULT. So here's the problem, no matter what he is going to want his moms approval. And if she doesn't like it he will totally change whatever he has to to make her happy. I understand wanting to include her and making his whole experience special but having a say in their name is something no one interfered with when she was naming her kids. And since his brother died she has asked several times to not name it after his brother which I understand and respect. But when we first told her and we rattled off some names we liked she literally said "no don't name your kid that". So regardless of how much she does for us, I don't feel like I owe her my child's name. And unfortunately my husband wants her involvement. And even though she liked the girl names we chose she sent a text with a name she "would like us to use as the middle name" ignoring her would be easy if my husband didn't feel he wanted her say in things. Has anyone else experienced anything similar ? I don't want to have to throw a fit but I feel like he's prioritizing her opinion over mine. I'm about to say why don't I carry this baby throughout the pregnancy and you guys name it, since apparently it has to be a special time between you and your mom and not you and your wife. Ugh! Chaps my ass so bad! And as long as he is set on getting her approval, and as long as she likes to have some control I'm screwed. I don't know what to do and I don't think talking to her about it will help. I told my husband that she met my daughter with a name already and she loves her perfectly the way she is even with a name she didn't assist with giving. I know he thinks it's different because it's her first technical grandchild but she doesn't have to name our baby!