.I was desperate. Anyway, since it was so hot, I put on a pair of cutoff shorts and didn't put on a shirt. I thought maybe I could join her sunbathing...for awhile and get a better look. I tucked my boner in my cutoffs and zipped up as best I could and walked out of my room trying to hide my bulge.As I went outside and drew near to her, she looked up and said "You want to put some lotion on my back?" I said something like "Sure that would be really nice." She smiled and handed me the bottle, I. Well with all the soap that I had on my hands and in her ass crack already I knew that she was lubed up and that sliding a finger in her backdoor shouldn't be a problem. So I gently started to apply pressure to her ass and the next thing I knew I was in to my first knuckle. I asked her if she was doing ok and she said that she was so I pushed some more of my finger in and shortly it was all the way in. I then began to work it in and out of my sister's ass, finger fucking her. I then reached. Then shower time came and I don’t know what triggered it, but when we undressed and went in to the shower I brushed accidentally up against her breast. My pecker quickly got hard as it could be. In a sudden my comfort zone with my mother was changed to an embarrassing moment were I tried to hide my cock.“What’s wrong?” She asked as she washed my back. “Nothing” I lied and faced the wall the best I could. “Your turn.” She handed me the wash cloth and had not yet seen my pecker proudly showing. On this particular day I got to wear a nice summer dress, and for the first time ever, he put some black shoes on my feet making sure they were nice and clean. I didn’t ask why the shoes were produced I just thought they looked nice with my outfit. Then the surprise, even though it was summertime he put a coat on me, took me outside to the car and sat me in the back. This was new, as normally I had to stay away from any windows and make sure I wasn’t seen by anyone in the street. ..Off we went.