(((((((((((((((((((((((((((((((anewme))))))))))))))))))))))))))))))
So much pain on both sides! I can imagine the hurt of your family after losing you for so much of your life. I can understand the depth of the pain they dealt with: they missed you so much, they became hard and cynical so as to quit hurting. If they consider themselves Christians of any sort, then this natural response really was indefensible.
Blessed are the merciful, for they will obtain mercy.
(...And those who don't show mercy could be receiving what they dished out, e.g.: "Have a nice life ... *click*")
I would that your aunt could relent and forgive you. What a wonderful gift that would be to you! Forgiveness is a gift paid by accepting pain; 35 years of pain is hard for her to accept. I pray God will convict her for her ugly words to you. And I pray God gives you grace for overcoming this response, that you can somehow forgive her.
About the trust fund... Using financial advice from a large variety of sources, perhaps you could present to your brother a detailed argument showing why a particular investment (eg, a mortgage) would be considered a VERY wise financial investment, growing in value. It would be very difficult for him to deny you if you have present a water-tight case. It's possible he will soften over time.
(If your brother considers himself a Christian, remind him of the prostitute who washed Jesus' feet with her hair. She came humbly, completely unable to undo her sinful history; and she received mercy, not judgement, from Christ.)
Again, anewme, I really am sorry for the sorrow you are having right now.
(((HUGS)))
bebu