No. Even if her name is also on the title of the house- You
would have to sign the deed. If by some chance she did get you to
sign one, she most likely would have to get the approval of your
mortgager, and that's another couple things you would have to sign
if it's not in her name. The sale of a house is a long and
complicated legal process. It would be nearly impossible for her to
sell it from under your nose. And If she did, there would be fairly
easy legal recourse.