Since grandad died my grandma regularry visits us and stay for a few days.
We don't have a big house and I had to share my room with my grandma. I'm 18 b.t.w.
My grandma is a friendly, chubby woman and although saggy, she have a pair of big boobies I can't take my eyes of.
I'm often already in bed waiting for her to see her undress to get a glimps of her big boobies.
And then waiting for the light to get off and 'help' myself.

One evening, when the lights were off, my grandma suddenly stand beside my bed, looking at me.
I must have groaned too load and I stopped on the spot.
My grandma came and sat next to me on the bed and in the dark I felt her warm hand slip under the sheet searching for my hard erected dick. "Grandma!", I wisphered, "You can't!"
"Easy", she said, "you do this old woman a great favor by letting me". She slowly strats to massage my hard on. " your my grandma" , I stumbled. " I'm the second wife of your grandpa and there is no i****t. It's fun for me to do, so let me!"
I was arroussed enough to stop her and my grandma took a lot of time to pleasure me. I asked her if I could play with her boobies but she told me maybe next time.
I came and grandma had to go to the badroom because her hands were soaking wet from my cum.
When she came back she gave me a kiss on my forehead and whispered: "Next time you may play with my boobies but for now, have a pleasant dream!"

Next day grandma went to her home and I'm looking forward for her next visit.