My grandfather’s will sparked family drama by leaving nothing for my dad, Mark, 67, or my brother, James, 41, splitting his estate between his daughters and me, taking Dad’s share. Dad and Grandpa had a falling out when Dad married Mom in college, and Grandpa cut him off, never meeting James or me. At the funeral, the lawyer revealed Grandpa’s decision, leaving Dad furious. Then, a letter from Grandpa dropped a bombshell: Dad isn’t

James’s biological father. Mom was pregnant when they met, and Grandpa, unable to accept it, disowned Dad. They never reconciled, but Grandpa’s letter expressed regret and a hope for healing. I confirmed this with my parents, learning it caused years of tension. Now, I’m torn—should I tell Dad the truth or keep it secret? The family’s also pressuring me, calling me greedy for not sharing the inheritance. I’m stuck in a messy situation, unsure how to proceed without causing a family meltdown.