So you telling me I have legal rights to her estate although she wasn't my biological mother, he has sold her property it was worth 3 million dollors

This is a bit of an incomplete set of facts, but a child that has been legally adopted stands in the exact same shoes as a biological child. A child that has not been legally adopted may be able to show a court that they were "constructively" adopted but this is a legal long shot and you need an attorney that is well experience in "probate litigation" This is just an illustration of the law and not intended as specific legal advice.