You were working in your back yard when you first heard the faint sounds. They were obviously coming from next door. You knew someone had just purchased the home and assumed this was your new neighbors. Or perhaps their dog because the sounds didn't sound exactly human.
The previous owners were friends of yours, so a gate was installed connecting the two back yards. You opened the gate cautiously, still thinking there might be a dog and you didn't want it tearing up your yard. Having opened the gate just a crack, the sounds direct your gaze toward a woman in her mid-twenties lying on a towel in the only patch of sunlight in the yard.
You would think she is sun bathing, and that might be how she started out. Now however, she has her right side toward you. She is on her knees with her shoulders on the ground and her head is facing toward you. She would have to see you except that her eyes seemed to be tightly clenched as she was using both hands to drive a flexible cock in and out of herself.
The sounds you had heard were her grunting and groaning as her passion drove her to abuse herself in the most brutal fashion. You could almost feel the impact of each thrust as it drove the breath out of her.
Your first instinct was to back up and close the gate, but you hesitated. You weren't even aware of your fingers slipping between your thighs as you continued to watch the new neighbor. When her climax washed over her, she went limp except that her hind quarters were still supported by her position with her knees beneath her. You saw the jelly toy protruding from between her cheeks where it wobbled frantically with the last contractions of her peak before sliding out and flopping on the towel between her feet.
The sound of your kids in the house broke the spell and you closed the gate and slipped back into the more familiar role of being a mother.