I guess this is a fairly strange question..

My best friend asked me if there was a way, if I'd consider being legally named her brother. I know, sounds strange but this is why...

She grew up in a household where she was sexually, physically and mentally abused. She wants nothing to do with her mom, dad or 2 sisters.

I've known my friend for over 20 years and we've been like Brother and sister since. I even gave her away at her wedding. She and her husband have had a child a year ago and she is worried that if something happens to them that their baby boy would go legally to the grandparents/sister who would wind up doing the same thing to their child that happened to her.

I know a living will/estate will, would possibly cover guardianship but could be contested by blood relative, correct?

Would she be able to disown her family in a way that would prevent her family becoming legal guardians of their child? And also, is there a way that she could name me as her brother, legally?

She lives in PA and I live in OH. I was born in Pennsylvania if that makes any difference in the matter.

Thanks for your time and attention to the matter.