Is it okay to be adopted or have step-parents/bonus parents? Yes, it's okay to have more than one set of parents since we already do; we have a Heavenly Father and an earthly father. In a way, WE ARE ALL ADOPTED since our true parent is Heavenly Father. Your spiritual pedigree can be written on a single line: You are a child of God. You were already nobility and royalty even prior to your birth. Your true family of origin is where you came from before you were born. You are His child.
What is it like for a birth parent to have someone else raise their child? Isn't this exactly the decision that God made in allowing us to have a mortal existence? As earthly parents, we apprentice what it is like to be a father and a mother. (For some, who remain faithful, this blessing may be fulfilled after this life.) Because Satan does not have and will never have a physical body, he will never experience what this is like. No wonder then that he tries to sabotage the family and sow confusion about the divine nature and calling assigned to us with gender. Satan is jealous of what he can never have.
As earthly parents, we don't have to parent alone. Heavenly Father is our co-parent. Some of the needs of children are met through earthly parents, most of them are not. Heavenly Father continues to be our most important parent. Many of our needs can only be met through Him.