My father's house is in trust for me, with a life estate provision for my step mother. Can I sell the house?

My parents have both passed away. My step mother lives in the house which is in trust for me, sole beneficiary. I pay the mortgage and taxes, but want to move into the house next year. If my step mother will not leave the house can I sell it? I will have no where else to live unless I sell the house or she moves out. thank you, Lisa Lavelle