A contract cannot arise out of an illegal act. 當事人不合法的行為無法成立一個有效的合同。
Sadly, after Gerda's operation, the Danish government annulled the couple's marriage since two women could not be legally married in Denmark. 可悲的是,在埃納爾手術后,丹麥政府取消了這對夫婦的婚姻,因為在丹麥當時兩個女人結婚是不合法的。