For example, what would happen if any of my family members apply for benefits along me?
Well, that is perfectly possible, and in that case we'll ask for your familiar's SS numbers and their birth certificates.
If any of them qualify, what would be the amount they will receive?
Well, taking your spouse as example, after effectively qualify, your spouse would receive a monthly payment of up to one half of your full retirement benefit amount. Best of all, those payments won't affect your retirement benefit.