I think each has to be open and realistic about their expectations.
I'm amazed in this day and age that some people enter into marriage believing that a piece of paper gives you absolute control of another person's life.
This was my ex, my FIL said jump, and my MIL asked how high. This has worked for them, I'm however very independent and, a piss-poor puppet.
Divorce has worked better for us (yes, we are still together), and had we both sat down and talked more about both our expectations for the future before we got married, I think we could have avoided a ton of grief.