An empty parking lot (DS )

“This isn't the university” Jessica says “nope but there is still some time left and we are going to use it the best way I can, get out of the car and spread'em” Jessica and Mark both get out of the car. Jessica turns around and lays her hands on the hood of Marks car. She bends over deep so that her brother can get a good look at her.
She hears Marks footsteps behind her. She feels how his hand feels the contour of her butt, how it squeezes it and then: A jolt of both pain and pleasure. Mark slaps her ass; he slaps it again and again. He takes her leash and pulls it slightly before he puts his dick against... “That is not my pussy!” Jessica exclaims.
“I know... just relax and enjoy.” She feels how Mark's dick slowly enters her asshole. Pain shoots through her body. When it is all in, he lets it sit there for a moment giving her ass some time to adjust. He then starts pumping slowly. Jessica feels the pain slowly turn into pleasure as her brother keeps fucking her ass.
Then he removes his dick and pulls her leash hard. Jessica turns round, she sees Mark holding his dick in one hand and her leash in the other. “Suck it.” He says. Jessica drops on her knees on the rough asphalt which is warmed in the sun. She starts sucking his cock until he cums. He shoots his whole load into her mouth and commands her to swallow. In one big gulp she does.