Then she removed my belt & unbuttoned my jeans. I helped her in removing my jeans. Now I was also only in banyan & underwear. Now we both again hugged...tightly & started a smooch. This time it was even more passionate. I told her to feel my dick over my underwear but she was way too shy to do it. So without saying anything further, I picked her hand & placed in on my hard dick. She just kept her hand on my dick for a few moments & then slowly started feeling my dick. Only god knows how I. I didn't really need any visuals, but the sounds added to the excitement, especially since it had already been playing on the way. So did the fact that I had no panties on underneath my incredibly short skirt; I wouldn't pass in public but tonight it didn't matter. As I pushed the seat back to get ready, I was already poking out from underneath my skirt. I ran my newly painted finger nails up and down my girlish penis as I pulled out my lube and my vibrator; sending shocks of electricity. As soon as I sat down, Carly started to scratch her upper thigh again. Like before, I got a fabulous view of her leg, all the way to the waist, and as before, the skirt hiked up and I got a little peak at the panties. Jack might have been ignoring the exposure, but I sure wasn't. Carly looked at the front of my shorts to be sure she was having the desired effect. She was.When Tadd left, Carly asked me to move down one so she could rest her legs on the stool between us. She put both of her legs. . A condom. I’m not proud of myself, but ultimately my hard-on convinced my brain that if my sister was fine with sucking my dick, what’s sex gonna matter?? I mean if one day I said “sis if you want money today you’ll have to fuck me instead of blow me!” do you really think she’d say NO? Of course not! So I unzipped my pants, and like any addict I convinced myself that this was an acceptable line to cross, then pulled on the condom. I carefully laid on top of her and slid inside. I fucked her.