"I guess what I am trying to say is if you had a sibling in a past life whats happened to the 2 of you in this life?"
-I think it depends on how your past relationship with them was. If it ended on a sour note, you probably have allot of issues that you try to resolve with them in this current life&you may have more of a distant bond, especially if you did eachother wrong.They probably won't always come back as a sibling. They might come back in the form of a friend,a lover,your mother...or anyone else significant that you meet along your path.If they come in the form of a friend...you probably meet them in a time when you need that type of person in your life,for good or bad reasons.

"I would like to know now what type of relationship this can turn into in this current life?"
-If you were positive influences on eachother's lives in the past, you probably come into this life with a significant bond-like immediate familly,instead of a friend that you meet later on in life.If it was a negative past life relationship, they might come back as someone who can enter your life BUT then also quickly be given the boot when you no longer get along.If you loved them allot, they could come back as a boyfriend or girlfriend...who knows?!, the possiblities are endless.

That's just what I think would happen