According to the Interpretation of the Supreme People's Court on Several Issues Concerning the Application of the Guarantee Law of People's Republic of China (PRC), if * * * and * * mortgage their property, the mortgage without the consent of other * * * people is invalid. However, if other * * * people know or should know without raising any objection, it shall be deemed as consent and the mortgage shall be valid. Therefore, if you can prove to the court that you really didn't know when your husband mortgaged the property, you can claim to the court that the mortgage is invalid.