She told me that their grandson was sleeping and just to check on him once in a while or if he was crying. She then told me to help myself to everythi...ng and that they should be home around midnight or so. After David and Vivian had left I got myself a drink and settled on the couch to watch TV. After a few hours I became bored with what was on and went to the cabinet where they kept their DVDs. I began to browse the movies but all they seemed to have was what I considered "Old people movies".. I passed the pool area and I went to the back of the shower area. Since we have backyard showers so we don’t wet the house but, passing the shower area there’s a more private area for tanning. I was a little nervous since this was a new thing to me. So I slowly took my blouse and my skirt leaving me with my undergarments. I kneeled on the soft resting area that was there to relax and tan. I saw the shadow of my body and I turned me on. I opened my legs a little bit and I put my both hands on. We got lockers near the front and put the pictures and bags in there so we wouldn’t have to carry them around, and I kept the keys on me since my shorts had zippers on the pockets, I wore those especially for today. We bound back in the park and headed to the Mantis which was next to the Millennium Force. Once again, thanks to our passes we jumped to the front of the line and were on it in no time. This coaster fared way better than the Force for Becky and Dana because it wasn’t nearly as high. “Here ya go.”“Thanks.” I was sitting straight up now, a little wobbly and a bit nauseous, but upright. “Mary?”“Yes?”“Why are we naked?”“Well, you lost your clothes.”“What about you?”“They’re in my dresser.”“Why?”“Why not? I thought you’d like me this way.”Boy, did I? Her boobs were round, big, with big areola, perky and oh so perfect. And ... fuck. This is Mary! My sister’s best friend. Uh, that is, my sister’s sister? I mean half-sister. My head was hurting too much. Come on acetone, work!“Did.