Because Jessica found Nick’s suggestion for a prenup to be offensive, the couple did not go through with any sort of financial agreement before they tied the knot. It wasn’t until they were in the midst of their divorce that Jessica wished she would have signed a prenup with her soon-to-be ex-husband.
At the time of their split, People reported that Jessica was worth an estimated $35 million, while Nick was worth around $5 million, which would explain Jessica’s regret.
Source : https://www.distractify.com/p/how-much-did-jessica-simpson-pay-nick-lachey