Legal Question in Real Estate Law in California

You appear to have a lot bigger problem than you are aware of. By definition your father's reverse mortgage was recorded before he died. Even if your quiet title claim is upheld, it will only establish title in your name as against the other heirs. It will not cancel the mortgage. Furthermore, it will only establish your title back to the date of your father's death at most, and will be effective of record no farther back than the date you recorded your lis pendens. The recorded deed of trust securing the mortgage, recorded while your father was alive, takes priority over your claim and any other interest that may have attached at any time after the deed of trust was recorded. That means a foreclosure will wipe out EVERYTHING after the date the deed of trust recorded. And THAT means that whether there is a buyer at the trustee's sale, or the bank takes ownership and later sells it as REO, they will own free and clear of your claims. So unless someone figures out a way to clear that reverse mortgage, you and the other heirs will have nothing to quiet title to, and your suit will be dismissed.