My question involves divorce in the State of: Washington

When the female spouse files for divorce after leaving the marriage and before the divorce is finalized and the male spouse dies of unexpectedly what can the family do? They were told that there is not alot they can do but I do not see how if a proceeding was started can't the family protect what would have been his assets from the divorce for the children? How often does this happen? Thanks for you guidance you can give.