My Father Passed Away 1 Week Ago. He Is Survived By Me, My Brother, And Sister. 2 Weeks Ago He Asked Me To Be The Executor Of His Estate, But Passed Before A Will Was Written Up. Since His Passing, I Found Out That An Ex-girlfriend Is The Beneficiary Of A Life Insurance Policy, And A 401k. Is There Any Way To Challenge Her Being The Beneficiary? They Have Been Broken Up For More Than A Year.