10-14-15 an apology never received

I have noticed I am in search of an apology and I am not receiving it nor any remorse for the hurt imposed upon me. My sister and my husband had an affair for many years and I know God has placed forgiveness in my heart for the incident but I am desperately seeking an apology and remorse from my sister. I feel so foolish to trust so many so much. Hard lesson for me to learn but I learned it. I don't feel bitter and i still want to trust people again I just learned who I cannot trust and they were the very people I trusted the most in this life.  I beat myself up wondering HOW could a smart girl like myself be so foolish?!? I guess it's true, sometimes a good heart cannot see the bad! I am trying to figure out how to truly let this go...and how do you FULLY forgive when someone doesn't show any remorse? So many unanswered questions. I pray the Lord will give me wisdom for this in His time.