If you are on the title or the deed, you cannot be evicted: you would be an owner, and an owner cannot be evicted from his or her property. Your right to the property and to use and occupancy of it is equal to her right. She does not have the leverage over you that she or her stepfather are implying, not if your name is on the deed to the home. The most she can do is she can bring an action for partition: a lawsuit seeking the court to order the sale of the property, because the two owners cannot agree as to what to do with it. If she does this, then unless you and she work matters out amicably, it is likely that a court will ultimately order the property be listed for sale, in which case both of you will lose it (after, presumbably, several months to over year, depending on how fast the court action takes and how strong the real estate market is in your area)--but as a co-owner, you will get 50% of the proceeds (after paying the costs of sale and paying off the mortgage) from the sale of the home.