Siblings ???

With my friend Gina’s help and her genealogy expertise we found out that Dorothy had two children prior to my birth.  Turns out I have a sister and a brother.  Mary who is 20 years older than me, and  Michael who is 15 years older than me.  I not only had their names but their address and phone number.  Were they my full sister and brother or half sister and brother?  This I could not find out unless I reached out to them.  Should I call Mary being she is the oldest? I thought to myself.   Mary lives in another state, so even though she is the oldest she lives far away.  Michael lives less than 15 miles from my home.  I decided I should reach out and call Michael.  Thank God for small miracles as I telephoned Michael with no plan in my mind as to what to say.  No one answered the phone and the voice mail picked up, I did not leave a message.  The next evening I telephoned Mary and her voicemail picked up, I did not leave a message.  Decided at this point that calling them was a bad idea.  How would I tell them I am their sister? Did they know about me?  How could they not know about me? I had so many questions swimming through my brain.  I decided I would write a letter and I would mail it to Mary out of respect for her being the oldest.  I signed onto my PC and wrote and wrote and wrote.  I had a finished letter but it was way too long.  Three days later with the letter replaying in my mind I sat down at the PC once again and perfected the letter to half of an 8 ½ by 11 piece of paper.  The letter was informative and to the point.  I was terrified to mail the letter, drove up to the mailbox, no one behind me at the drive through, said a small prayer, kissed the letter and dropped it in the mailbox.  Thought to myself “I had nothing to lose”.  Not really true, I had so much to lose, I was so fearful of rejection from Mary and Michael, worried that the same family would reject me a second time.  So I waited for a reply, the wait seemed like an eternity to me.  Patience….not an easy thing for me to practice.