Dear Abby: He lives rent-free in his dying father's house but refuses to talk to him

A grandson is refusing to communicate with his family members, including his parents, while his father battles cancer. Despite living rent-free in his dying father's house, the young man remains silent and offers no explanation for his behavior. The family members express that they are completely clueless regarding what specific changes the grandson wants from them, as he provides no reasoning or communication to resolve the ongoing tension during this difficult medical crisis.