OIZA-006 Grandpa molests his grandson's friend who came to stay

My grandson, who lives with me, brought over a cute friend. It seems he's staying over at our house tonight... When I passed by his room after a bath, I heard laughter and some obscene conversation... I wondered when they had started talking about such things, and I thought I'd go and punish them when they were asleep at night... [There may be some disturbances in the video and audio]