I had to be honest with myself. I was enjoying it. I enjoyed exposing myself to him, jerking off with him, enjoyed him stroking my dick and making me ...cum. My dick still throbbed with the excitement of the blowjob he had given me in the car half an hour ago. I owed him. And I was ready to pay my debt.I was ecstatic. I looked down at my sleeping big brother and wanted his cock in my mouth. I was fascinated by his huge man meat and wanted to explore every each of it. I wanted to cum on his. He slowly begins to kiss her neck, softly rubbing her back with his fingertips. Slowly moving his hand to her shoulder, he gently slides her dress strap off the side. He kisses. Slowly working back to her other side, he does the same. Her dress is caught on her ample breasts. He reaches around to find a small zipper, and her outer wear falls to the floor revealing soft black satin lingerie. She slips her hand under his tightly fitting shirt and rubs against his core. She pauses as she begins to. "Fuck me.. come on! Is that it?" he asked. I grabbed him by his shoulders and started thrusting as hard as I could. "Yes! yes! fuck me like that! come on!" he was talking so much I had to let him have it. It didn't matter that I was fucking his ass, I was going to fuck it like a pussy. I pulled out as he looked back surprised. I flipped him over onto his back and had his legs wide open as I got on top of him and slid my cock back in his ass making him moan. looking down at my cock ad watching. “We should just pretend we don’t even know each other” I half joked.“Oh I don’t know, I think the fact we do adds a real kink”, mom said as she turned and looked me in the eye.I paused for a moment and said “I am going to sit in the back seat, you can join me if you want or I can take you home”.Mom watched me climb into the back seat then without speaking mom climbed into the back of the car. Mom sat sideways looking at me and crossed her legs so I could see the top of her stockings.“You know.