Likelihood of individual, who refused to move out and sell willed estate, changing me a "living expenses fee" for their time living there?

According to a will between two individuals, an estate was supposed to be sold and equally divided between two individuals after the death of the owner. However, the one individual, who has lived in the house there entire life, was non-cooperative in moving out and essentially refused to sell the house. As this situation was leading toward a complicated legal battle, the other individual, already leading their own life, decided to stop pursuing the sale and left the individual to stay in the in estate. Now, approximately five years later, the individual living in the house, now realizing that they will inevitably have to move towards a sale, intends to charge the other individual a sort of "living expenses fee" for the period in which they lived in the house between the death of the owner and the eventual sale. I'm assuming that this would not hold up in court--as the individual living in the house refused to leave nor is this clause included in the will-- but I just want to make sure