When I was visiting her on vacation. I would sleep in the living room with my grandma and other family members. I stayed over her house for about a month. During half of the month she got more risky asking me questions like “let me see your dick, no one is here” I would always say no due to being shy. She would ask me that same question over and over. To the point where she did it her self. At night everyone fell asleep, me too. Except for my grandma. I remember waking up to my pants down to my knees and my dick out with my grandmas hands around it playing with it. I was hard as a rock. She saw that I woke up and asked “why is it so big and hard” swinging my hard dick around and later she jerked it and I cummed all over her hand. After that she cleaned it up and no one knows besides me.