Gina and Stacy were always adventurous and now, despite the fact that they have graduated school and are living together in downtown apartment, they still enjoy a game of dare, taking it to extreme levels and trying always to top the others dare.
Its a Saturday morning and they are both off work and decide to take their pet poodle for a walk in the park and enjoy the break from the rain that has drenched the area for the last three days.
The park is unusually quiet and nearly deserted as they arrive and they take the familiar small path that winds through some wooded area and back to the picnic ares at the entrance. They walk for nearly twenty minutes and stop for a break.
"Game," Gina announces, giving Stacy notice that a game of dare is on and she nods and repeats the word signifying her acceptance of the dare.
"Go over behind those bushes and strip down to just your panties," Gina instructs Stacy.
"Leave your clothes behind the bushes and come back to me for further instructions."
Stacy reluctantly walks over to the bushes and looks around to ensure no one is coming, although she knows that would not stop the game. She takes off all her clothes but her panties as instructed and carefully walks back over to where Gina and pup are setting.
"Very good," Gina grins. "now come over and lay across my lap face down."
Stacy swallows hard and assumes the position of straddling her sister's lap, fully aware that her thong underwear are giving Gina and anyone who should pass by a perfect view of her ass cheeks.
Gina pulls the thong undies making them clutch her sisters pussy tightly and begins slapping the exposed ass cheeks as the stretched fabric slides along her pussy lips.
Instinctively, Stacy reaches her hand back to protect her from the blows and to cover her exposed ass but is informed that any attempt to cover herself will result in the panties being pulled off completely.
One by one she feels the blows land on her ass cheeks turning them deep red, while at the same time Gina continues to pull the panties tightly to enhance the view of her pussy lips.
Gina takes her hand and now begins running her finger along the pussy lips as he sister twitches and pleads to be let up before someone comes. "The only one cumming is you," Gina responds. "I want to see your crotch soaked in your cunt juices," Gina announces sternly.
Stacy whimpers a little but can't deny the arousal she is beginning to feel at her sisters stimulation and soon her crotch is soaked from her gushing pussy as Gina continues to work on her.
Just then the sound of someone approaching can be heard in the distance and the faint sound of male voices.
"Let m up Gina someone is coming," Stacy pleads but is met with only a laugh.
"That is your problem girl, not mine," her sister remarks sternly. Her face blushes and a moment of panic sets in but to no avail and soon two males out for a jog happen upon the scene.
Not believing what they see, they stop and gaze on the erotic scene before them.
"Stacy we have company," Gina teasingly announces. Her embarrassment is only compounded when Gina invites them over to spank her ass and feel up her pussy and they gladly accept.
Their hands roam over her already soaked pussy and she knows now that there is no way to prevent an orgasm. While the strangers hands spank her ass and rub her pussy she explodes in a mind blowing orgasm, soaking her panties even more as she moans from utter humiliation and embarrassment.
The guys hang around a minute then take off jogging leaving the sisters alone again.
"Go get dressed," Gina orders and Stacy stumbles back over to the bushes and puts back on her clothes and the girls head back to the apartment.
All the while Stacy is running over in her mind how to get even with her sister and make a more daring game.
