Over it! Opinions?

Before my husband joined the airforce we naturally asked my sister some questions because she was in for 4years. At the time one job was the only job available.. My sister said not to take it and it was a horrible job and not to let the recruiter bully us. We know about recruiters and we talked to multiple people in the military about his job to gather info. While we took what she said into consideration. My husband still joined with that job. She got upset telling us that my husband just let a stranger bully him, he obviously can't make decisions for himself, I will no longer be a priority to him and he can't really take care of me. This upset my husband a lot. It's been some time now and we have a baby on the way. With this specific job certain bases don't deploy him. My husband and I are trying to find ways/just hoping to get one of those bases. Of course NOTHING is a guarantee in the military. I told my sister this and she starts explaining his job and how that info is incorrect. Btw she had a completely different job and claims to know people with the job. I told her, he got the information from his bosses, learning the job and knowing coworkers at these bases. We know deployments are part of the job and that's okay.. I still dont see the issue in TRYING to go to base where deployments are less common. My sister lectured me about embracing deployments and how there is absolutely no way to avoid them. And because of the job he chose, he is stuck.. I told her I had errands to run, and she wouldn't leave me alone.. Then I told her to drop it, wouldn't leave me alone. He actually likes his job and it wasn't near as bad as she made it seem so far. She then started using our mom to say "mom wanted me to look out for you and is asking for my help" and I told her I didn't want help and if I did, we would ask people that have/had his job. I then told her "mom told you to ignore you" which I'm now feeling super guilty for throwing my mom under the bus. Am I in the wrong and again I feel so childish and guilty for doing that to my mom. Again I know to the military you're just a number and nothings a guarantee. But she was acting like we were stupid and didn't know his job nor that he would deploy at some point. My husband's boss agrees with us. 🤣 but I dont know how to calm this when shes so passionate about it. Every text was an essay and she wouldn't stop even after I told her to leave me alone. Sorry this is so long, I tried to make it brief, but you can ask me any questions. Again I just don't know how to calm this. She wants to see the baby after the baby arrives but every time I see her, she has to throw shade at his job. I feel like this is so petty 😭