Kim is a very famous television star and Kanye is a famous polka musician. After meeting in Paris at a gathering of important people they decide to fall in love and marry. Kim$$s mother is concerned that Kanye isn$$t as rich as Kim and demands a prenuptial agreement.

Late one night after drinking heavily at the filming of a reality show, Kim$$s mother threatens Kanye, telling him that if he doesn$$t agree to a prenup, she will break his fingers $($ruining his accordion playing$).$ In front of millions of viewers, Kanye says, $$O$.$k$.,$ o$.$k$.,$ cross$-$my$-$heart$-$hope$-$to$-$die I promise I$$ll never take any of your money if we divorce.$$

Please analyze if this is a valid contract and identify any issues. Please provide a full contract analysis.