Judy's grandparents weren't decrepit by any means but they were getting on in years so that her mother worried about them. She insisted they stay with them while their house was being remodeled so that the elderly couple wouldn't trip and fall over any of the debris. To Judy, the presence didn't matter much. She was in college, after all, and was barely home except on the weekends when she needed time to study. Studying was more important to her than just about anything. She was a shy girl who never really had any friends and had never had a boyfriend even though she was passed nineteen years old.
Taking advantage of the lack of classes, Judy usually slept late on Saturdays so she was used to being the last person downstairs. Her family liked their breakfast early so that they could start their days. Judy was surprised, then, to hear noises from the room her grandparents stayed in as she made her way to the bathroom around ten one Saturday morning.
The noises sounded like grunts of exertion. Judy adopted her mother's paranoia over her grandparents injuring themselves somehow so she quickly made her way to the door. Not thinking about knocking or asking if they were okay, she eased the door open in her need to help them. The sight that greeted her shocked her so that she couldn't move a muscle.
There, on the bed, was her grandmother, Agatha. She was completely naked, legs spread, as her fingers dove into her pussy over and over again. Her wrinkled skin and sagging tits jiggled with the exertion of her masturbation while her eyes rolled around the room, finally coming to stop on her granddaughter standing in the doorway watching her.
Both were too shocked to move for several seconds but then, Agatha continued her finger fucking, her eyes glued to her granddaughter. Judy's own eyes traveled over her grandmother's body, taking in every detail. What fascinated her most was her grandmother's white, hairy, dripping wet pussy. Agatha's fingers disappeared inside over and over, making a sloshing sound thanks to how wet her hole was. The little grunts her grandmother made became louder and Judy found herself slumping against the doorframe with weakness.
Judy's own pussy suddenly filled with moisture but she couldn't bring herself to do anything other than stare at the vision of her grandmother masturbating right in front of her. When her grandmother started cumming, Judy's own pussy convulsed even without physical stimulation until both of them were erupting simultaneously.
Catching their breath, they both panted as they held each other's gaze. Judy didn't know what to say or do but she knew this was the most erotic experience of her life as well as the first orgasm she ever had. Suddenly embarrassed by the situation, she fled to her room hoping her grandmother wasn't angry with her for spying.
Judy successfully avoiding her grandmother over the next several days and was relieved when she didn't get into trouble over the ordeal. In bed at night, however, Judy's mind went back to the scene again and again. She couldn't help but touch herself as she thought of it. She also did as her grandmother had done, driving her fingers inside herself over and over until she felt a release much like that day she watched her. But it wasn't the same. Judy wanted to watch again. She resigned herself to the reality, however, that it would probably never happen. Or so she thought.
It was the next Saturday morning when Judy was waking up, figuring everyone was already downstairs. She forced herself not to think about her grandmother but as she opened her eyes to the room, it was her grandmother that she saw at the edge of her bed.