プロンプト

cowgirl from behind , view from behind, her whole body movement is extremely smooth, extreme vaginal penetration, the penis immediately and continuously slides entirely in and out of her vagina as she slides her whole body up and down, her ass slides all the way down pounding against his pelvis as she slams down hard to the hilt of his penis, bouncing impact motion action, she slides her entire body all the way up to the tip and all the way back down to his pelvis repeatedly and continuously as his penis slides deep into her vagina and back out, he doesn't move, she does all the work She screams in extasy, his penis girth stays the same as it comes in and out.