You’re probably a nice guy for thinking about the potential implications this could have to this degree. But a lot of reality occurs in the subtext so you got to manage the situation as best you can with both parties being as aware as possible (without writing things down in any certain terms and having it signed lol)— based on what is presented this girl seems well aware of what she’s offering and pretty chill etc I mean you’ve known her for a pretty good amount of time anw man! So you’re the best judge of whether you both can handle it if things go all the way after the wedding... may you both get what you want out of this situation! Just have a good night dude. Good luck!