I masturbate my grandma

Hi, I'm going to tell you a story that happened about five months ago at my grandmother's house. She does Zumba and has a very good body in my opinion, I always masturbate thinking of her. One day at my grandmother's house, she was in the kitchen and I was in the room where I sleep when I'm going to stay over, so I decided to go to her room and use one of her thongs to masturbate and do it on her bed at that moment when I was masturbating, she enters. -G (grandmother): what are you doing with my underwear and on my bed? -M (me): oh, nothing, it's not what it seems like. -G: are you masturbating with my underwear? -M: yeah... sorry, I shouldn't have done that. When I'm about to put away my penis she says -do you want me to help with that- and I'm surprised and say -okay if you want- then I take out my penis and she's surprised to see it and sits down next to me and starts masturbating me, I loved it and I said -you're doing it well-. -G: I know, not a single word to anyone. She kept on masturbating me and I couldn't finish, she says -you still have a long way to go-. -M: yeah, I do. -G: okay, hurry up and finish. -M: if you take off your clothes it will be easier. -G: aren't you crazy, I'm your grandmother. -M: please, do it for me, I've already seen your cock and you're touching it and I'm your grandson. And she gets up and undresses in front of me and sits down next to me again and keeps on masturbating me, I also undress and we lie down to be more comfortable, I start touching her too and she likes it, she says -don't stop- and we kept doing that for about half an hour when we finished, she says -next time you want to touch yourself, let me know, I enjoyed it-. -M: obvious. I give her a kiss and she gives me her underwear and says -take it and keep it until you see me again, so you remember this day. Hope you liked the story, everything is fictional. And comment and leave points and say if someone else wants me to tell another story...