‘I grew up an only child’: My father wants me to inherit the family home, but my late mother also had a son from her first marriage. Are we doing the right thing?

Dear Quentin,

My mother and father were married for almost 60 years, and my mother just passed away. I grew up an only child. I am my father’s only child; however, my mother was married before him and has a son who is my half-brother. She didn’t raise him, nor did she see him until he looked her up about 20 years ago. 

When my mother…