I was in a de facto relationship with a lady for 6 years. We had no children. She died in 2011 and left me a life tenancy in her house. I was also appointed as an executor of the deceased estate. The brother of my de facto was also appointed as an executor of will. Apart from the house, the remaining assets were distributed between her sisters, her brother, her mother and me. On my death, the house is sold and the proceeds go to the principal beneficiaries or their heirs if they are deceased. I wish to make some improvements to the house - specifically a carport. This will increase the value of the house by about $50,000. Can the other executor refuse to allow this improvement to go ahead?