On a weekend outing, I used the excuse of taking my sister-in-law to see the scenery to drive into a secluded grove of trees. She was wearing a tight white T-shirt and denim shorts. When she bent over to get water, her round, pert buttocks were facing me, her panties bulging alluringly. I pressed her against the hood, lifted her shorts, and probed her already soaking wet pussy with my fingers. She bit her lip and moaned, "Brother-in-law...no...we'll see..." But her body honestly twisted and writhed in response. I pulled out my already hard and burning-hot penis and thrust it in from behind, each thrust reaching the deepest point, making the car shake violently. She braced her hands on the hood, her breasts swinging up and down with each impact, her moans growing louder and louder: "Ah...so deep...brother-in-law...fuck me to death..." I gripped her waist and thrust wildly, the head of my penis grinding against her sensitive flesh, her juices flowing down her thighs. As she climaxed, her vaginal muscles gripped me tightly. I let out a low growl, pulled out my penis, and ejaculated my hot semen all over her flushed face and slightly parted mouth. She licked the white fluid from the corner of her mouth, her eyes glazed over: "Brother-in-law... next time... I want more..."