She was wearing a raincoat and sitting quietly, not looking at me, just staring at something ... or nothing. I walked up the steps to the platform and...moved slowly toward her."Hi, Merilee," I said quietly. There was no one else around. We had the place to ourselves."Hi, Dieter," she said calmly, looking at me. She wasn't smiling.I sat near her, but not next to her. I wanted to see her face. Maybe get a hint of how she was feeling. What she might be thinking.I wasn't sure how to start. I had. Her legs started to twitch and her cute little feet were curling and uncurling over and over. Then all of a sudden she rammed her fingers deep into her pussy and let out a low moan. Her legs clamped together and she started to shake. I realized that I was watching my little sister cum. As she came back down the earth her breathing slowed and her toes uncurled. I knew that I needed to get out of there before she found out what I had done. I mean I should not have been watching her masturbate.. .. the blouse ... umh ... Grace ... wow!Whoever had done the open cutwork and lacery had demonstrated that there was a lot of Grace under the white, now mostly translucent ... nearly transparent fabric. There was one very low cut thinly shoulder strapped camisole slip of open work just edging the bottom of the far more form fitting skirt. It was shorter, too.But then, Grace was taller. (No ... she wasn't, the skirt was shorter.)The gloves fit and the little purse was a riot of delicate yellow. I slowly gained consiousness and looked down to see my hand was in a cast.As I sat up, I felt something strange round my waist. I lifted the sheet up and discovered that I was wearing some sort of diaper.“Great.” I muttered as I threw my feet over the edge of the bed.I was hooked up to an IV drip and I clutched the rod for support as I stood up.I slowly shuffled out into the hallway.“Hey! Where are my sisters!” I demanded to the closest nurse.“You shouldn’t be out of bed!” The nurse.