Please consult a Real Estate Attorney for the answer to this legal question. Removing your name from the Deed, will not however, remove your name from any loan you both are on. That would require your sister getting a new loan in her name alone. That would then remove your name when the new Deed is recorded.
Hope this will be helpful. Do feel free to call me at 757-474-0040 here in Virginia Beach, Va.
Betty Stern, CRS,GRI