He never intended that I pay it back. It was a gift to me and my wife. Dad would be rolling over in his grave right now if he knew the way you're talking to me. You never trusted me. You resent me because Dad always liked me better.
Personal matters can, and do, erupt into legal battles.
And in those fights, no one ever really wins. Further, monies that could have been divided among family members will instead be paid to lawyers. As legal counselors, we cannot resolve childhood angst and heartaches. Memorialize this decision in a legal way so that all the world will know what you intended. If you intend the transfer to be a gift, then say so.