Why do peter dad and granddad cry at the end of the lesson the blanket by Floyd dell?

At the end of "The Blanket" by Floyd DELL, Peter's dad and granddad cry due to the emotional weight of the family's struggles and the realization of their shared love and vulnerability. The blanket symbolizes comfort and protection, highlighting their deep connections and the pains of their past. Their tears reflect a moment of understanding and empathy within the family, as they confront their feelings and the sacrifices made for one another. This poignant moment underscores the themes of familial bonds and the complexities of love.