When I was young in the 90s, my parents used to take me to Utah in the summer to see my 62-year-old grandmother. She was a sweet little grandma. No one would think badly of her. Until one day my parents went out and left me at her house for a few days. On a normal night, they sent me to bed early, nothing out of the ordinary. I put on my pajamas and went to sleep. But I woke up in the middle of the night for a glass of water. When I left the room, I noticed that the light downstairs was on in the living room. I could see a huge young BBC guy sitting on the couch. Next to him was my grandmother sucking his huge black cock. I was surprised, and far from being scared, I got excited when I saw them. Obviously, I hid well so I could continue spying on them. I started to masturbate until I saw my grandma get up and lift up her dress and lower her huge panties. I noticed she had a gigantic ass and a hairy pussy. The black guy wanted to fuck and she knew it and got on his huge cock to ride it. I could notice that she wanted to moan but she knew I was there and like a lady she held back, until the bull let out a roar and I noticed he was cumming. God, my grandma couldn't handle so much cum in her pussy. Later, she sucked the guy off again. I will never forget that anecdote. After a while, I understood that my widowed grandma of 1 year was in need of black cock. I will never forget that anecdote.