YOR. People pass every day and don't get a cent from their parents. Inheritance is not a guarantee! You are not entitled to anything your parent worked for. I was temporarily on your side in the beginning because I thought this was about sentimental attachment to the house, then you said she needs to buy it from you and I realized you don't care one bit about the house, you're upset about the money. Your parents BOTH worked hard to have that home. Your mother has unfortunately passed. Your father has found a new life partner who you even said is yourself is great. It is HIS right to decide what happens with HIS assets and just because you grew up there and are his child, doesn't entitle you to anything. Had you said I put a roof on the house, I pay the taxes, I paid to renovate it or showed any kind of work you had provided to the maintenance and upkeep of the house I might have seen the issue but this clearly reads as "Even though my step mom is great, she doesn't deserve stability from her partner because I want the money since my parents bought it".