I rubbed my hand down grandma's back and feeling the bottom of the V in the back, and on down past it, it felt like the bottom of the V was about four...inches above her butt crack, which I could feel her panty waist band, and when I rubbed her butt with my hand, I felt the leg band on her panties, which felt like was covering only half of her butt cheeks.Grandma rubbed her hand across my shoulder blades, then down my back to my butt, and gave it a squeeze about the time I gave her butt a squeeze. The system enables me to move my legs. “That’s good.” We walked in silence for some time. Her gait was getting ataxic, her face darker. She stopped to rest for moment, then continued to struggle with her dying legs. “I will take over from now on,” I said. She nodded sadly and slipped her crutches from under her arms. I lifted her up with one arm a round her back and the other under the back of her knees . “Thank you,” she said and rested her cheek on my shoulder. I had no problems. I pushed Melanie back onto the bed and jumped on top of her and slipped my hand down between her legs as I had done all those years ago in the bath. I began finger fucking my sister again and slipped down her body to start licking her juicy slit. My tongue found her clit even though I didn’t know what it was, flicking over it gently as my fingers pumped in and out of her tight snatch.“Yeah like that Matt, “Melanie Said in a whispered voice, “Finger fuck your sister like that, don’t ever. I quickly made it up her neck to her face."Maybe you got some down here, Brian, you'd better lick me just to make sure," as she opened her legs wide and led my face between her legs. Oh, here it is, what I've dreamed about ever since I saw my first Playboy magazine. A real, live pussy."Here, look, this little thing, right here. My clit. You've heard of a girl's clit?"I nodded and she said, "Lick it nice for me, Brian, I'd just love that."As she held the little flaps open over her clit, I licked.