On Her Ass

"Cum on my ass." Emma moaned.

Edward pulled out and got up on his knees. Emma quickly rolled over and thrust her butt up. She wanted to be dirty. She wanted her uncle to look at her ass while he came.

Uncle Edward seemed to want the same thing. His right hand stroked his slick cock, his left hand grabbed Emma's butt and pulled a cheek to expose her pink center.

Emma's asshole clenched at the sudden rough treatment. Then she reached down and rubbed her clit, trying to cum with her uncle.

Ed was close, she could tell by his breathing. She moved until she was on all fours and arched her back. Then with her free hand she reached back, grabbed her other butt cheek, and pulled herself open.

"Cum on my ass Uncle Ed, cum on my little asshole." Emma panted as she rubbed herself faster.

Ed pushed the head of his prick up against her filthy hole and released his first blast of cum. Several more globs of the thick fluid followed, hitting her butthole like a bullseye, then running down her crack and over her pouting pussy lips.

Emma rubbed herself to orgasm as Ed finished and tucked his dick away. She released the hold on her own butt and rubbed a fingertip through the cum and around her puckered hole.

"So dirty," she said through clenched teeth as she made herself cum.

"Indeed." Edward agreed as he finished getting dressed. "When you're done being a filthy whore, go clean up in the lake."

Emma didn't answer, lost in the throes of orgasm, as Ed left.

After calming down she decided to skip her uncle's advice. She wiped herself with the towel instead, replaced her bikini bottoms, and headed back to the house.