It's also known as a "Decree of Divorce" or a “Postnuptial Agreement”.
But if by deed - sans a marriage dissolution - you'd better have an attorney draw it up in language so that she isn't conveying it back to herself as a marital property interest.
Plus, I would have the instrument clearly express the purpose, nature and consideration for the conveyance and her acknowledgement that it is being executed voluntarily and not under duress and/or undue influence. AND that she is doing so upon the advice of independent counsel.
All of which I would put forth in her sworn affidavit appended to the deed!
Pretty risk to do it otherwise. At least in my state, which is several mountain ranges removed from New York.
Sax