In the state of Tennessee: Who has rights when it comes to "Living Rights"?

In the state of Tennessee: My mother in law recently died. About 8 years ago, my husband and I built a house (that is not deeded) on her property that she had promised to my husband upon her death. In her will she went back on that and gave my husband (her son) living rights to his (our) house and property. Upon his death, her will states that the house and property will go to his oldest son. My first question is, the property is currently in my mother in laws name, will that go into my husband's name until his death and then go to his son's name or will it go directly into his son's name? My next question is, who is responsible for taxes on the property now? Next, I do not have any relationship with my stepson and I believe that he will expect me to move upon my husband's death. Is there a "set number of days" that I will have to move should I outlive my husband? (I am the same age as my stepson so chances are that I will outlive my husband) My last question is, does my stepson have any legal rights to the property while my husband is still alive? (He wants to bring old cars and store them on the property right away...can he do that?) Thank you for looking at my questions.