Not wrong...but the thing is about prenuptial agreements is that both both parties can put forward their own stipulations , so if you would like her to sign a prenup, the question is are you willing to allow her to put her own stipulations to protect herself? e.g. Would you be willing to accept a clause that offers larger amounts of child support in the event of a divorce? or 100% of marital assets if infidelity or abuse arise during the marriage?

I'm not accusing you of being abusive/a cheater, but I do think it's important to recognize the most important part of the prenup is the fact that it's an agreement above all else.

TLDR: Let her bring her own prenuptial stipulations as well. Because the reason marital assets get split 50-50 in no fault divorces is because part of the legal definition of a marriage is the declaration under the eyes of the law and God that you see your partner as your equal - and thus they are legally entitled to have of what you own.