As soon as Ellie closed her bedroom door, I rushed into her bathroom, turned on the light and adjusted the door to about the same gap as she had it. I stood where she was and looked in the mirror towards my bedroom. Completely dark! Yes! Standing in the lit bathroom, I couldn't see a thing past my doorway. I would be able to see her but she wouldn't be able to see me. Perfect.
I jacked off in the shower, shooting a huge load of cum as I replayed my granddaughter's show over and over in my mind. For the rest of the day, I tried to act natural but every time I looked at Ellie I saw her naked tits and her teenage pussy. My cock was stiff the entire day and I kept trying not to let it show. I jacked off again before I went to bed.
Just before I drifted off, it occurred to me that Ellie may have been leaving the door open all along but this was the first time that I wasn't already downstairs when she got up. Because I had a good book and stayed in bed later than usual, I got to see my gran
