I’m a bankruptcy attorney in California. First of all, you must list all of your debts on your bankruptcy petition. Second, a bankruptcy will not get rid of the lien the second mortgage holder has on your house. A bankruptcy might buy you some time to get caught up or sell your home, but it will not eliminate the either mortgage.

You should consult your divorce lawyer. There might be a way to force your husband to take responsibility for some of this debt so that you can keep the house depending on the laws of your state.

No, you have to either include or exclude ALL mortgages if it is applicable in your case. The amount of equity in your home determines whether the mortgage will be included or not. Seek legal guidance from an attorney who specializes in Bankruptcy Law - not all financial attorneys do, though they can file for you - before you decide to declare it. You’ll have to file and appear in the U.S. Bankruptcy Court in your state. Don’t do this on your own - definitely seek legal assistance regardless whether you file or not!
Link to US Bankruptcy Courts, Get info here & Choose your State

maybe, consult a lawyer