To the OP.
My fiance and I have a prenup. We are kind of in the same situation as you but I have the money and she doesn't. We both wanted a prenup to have a contract of how the money would be distributed if something were to happen. It phases out over time (a very good idea) and as for family inheritance, if my folks give me the money then it's ours as in hers and mine together. Your woman's parents need to figure that one out, not a pre nup. Her parents can easily decide to pass on their money to your kids rather than you and her.
Our prenup is set up to pretect me, my company and my assets in case it doesn't work out in the short run (thus proving she's a gold digger). My girl was not insulted at all (probably because she isn't a stubborn person) and actually had some great additions too it (we worked on it together).
You are being insulted for no reason. First off, if you plan on being married forever then who the hell cares? Sign it and forget about it. If you can't forget about it... then place yourself in her shoes. My situation and maybe her's has simularities is in the tune of I OWN my house (no mortgage), I have a large 401k already built up at a young age, I make a "good" annual wage, I own multiple cars (no payments), multiple boats (no payments), multiple original paintings, as well as my grandparents are multi millionares and my parents are multi millionares which I know exactly how much I will get upon their passing and even if I were a burger flipper I would be an instant millionare after taxes (and no my parents/grandparents are not going to waste the money away prior to death as the majority is already split out into seperate accounts for their children). VS my gf who has a total of $70k in debt and owns nothing to her name and makes $25k a year.
Hell yeah I got a pre nup!!! And your gf should too. If you were in her shoes you would as well. Quit being a winey biotch and get over the fact that you don't bring as much to the table financially speaking as she does and she want's to protect HER assets from YOU and she has every right to do that. You have no right to her inherritance nor her Dentistry.
Get a laywer to look it over prior to signing, add some in yourself or modify some of it so you and your woman are building it together and make sure it fades out in time.
Most importantly remember that if the roles were flipped (you had all the money and she were broke/didn't make crap for income) you would want one too. So don't be hard on her.