[Sam the Sham]

A pre-nup is perfectly voidable if it is "unconscionable", (i.e., one party was head over heels and signed anything) or signed under duress (i.e., bride is pregnant or in this case right before the wedding).

[taxcontrol]

Not according to SCOTUS. The "out" that SCOTUS left was for cases of extreme hardship. If this is not overturned, there is a LOT of clarification that will need to come out of SCOTUS.

[AndyJackson]

or she or her family had laid out a small or large fortune in wedding preparations, gave up a job, an apartment, etc. etc.

The marital contract - offer to get married and its acceptance - had already occurred long before one guesses, so this is, if anything, a unilateral alteration of the contract.