X-Runner wrote: Is the your prenup concern caused because you would like to be entitled to her family's money if you divorce?
To me, this is the key point. Why are you upset about the idea of a pre-nup, unless it's because you're looking forward to getting your hands on all that cash?
If a family has money (and especially if one member of that family has already been burned in divorces), then there's pressure to have a pre-nup. It doesn't mean your fiancee thinks you're untrustworthy, it just means that, WHOEVER she marries, she is expected by her family not to jeopardize their ability to pass their wealth on to future generations.
From your point of view, do you really want to start your marriage bitter about the fact that, if you split, you don't get to raid your wife's family's piggy bank? My perspective (having been married earlier this year) is:
(a) My marriage is forever, so it doesn't really matter what the post-divorce provisions are; but
(b) If something does happen to the marriage for whatever reason, I have no desire to profit from the failure. I can and will support myself, even though my wife's family has way more money than I or my family do.
Having said all that, the advice to get a lawyer to look it over is ESSENTIAL. You don't want to gold-dig, but neither do you want to get screwed if things go wrong.