Finally the day of my birthday, My girlfriend Diana and her sister Julie were up at the cabin with their mom Marilyn shutting down the cabin for the w...nter while her dad had the house to himself for his football/ suck fest party. I showed up almost 2 hours early, You made me a drink that tasted like root beer and I caught a buzz pretty quick, We sat on the couch and watched the pregame show for a while before I learned over and began unzipping his pants and pulling his big thick eight inch. Me, Mom, my little brother, and Rascal {Our monster German Sheppard} were in South Carolina stretched out on the beach enjoying the sun. We went there every year for vacation. We rented the same little house right on the beach every year since I was ten. We always have a blast. Most eighteen-year-olds would prefer not to go on vacation with their parents, but I still looked forward to it every year.Me and my little brother had thrown the Frisbee around for Rascal for a few hours and then rode. There was an older lady who liked dog walking, but she was never going to get a look in, which left one other who was 27 and looked very sexy, she said she liked older men and had a bit of a wicked side, that If you dared tap into, she would help you realise your inner most secrets and fantasies.I wasn’t keen on her, probably because I felt a bit jealous if I’m honest. I just felt she could get under daddy’s skin and he wouldn’t have any time, or love left for me. It was Sarah and she has not. .in that position she was tensing her ass cheeks making them look even hornier and seeing her pussy open for me as I whipped her lips was turning me on so much....after 20 strokes I put down the crop and knelt behind her to take a closer look at her pussy....her lips were red and I could see little lines where the crop had stung her....I pushed two fingers inside her and she was even wetter than before...she really was a dirty bitchNext I led her over to a table in the middle of the room and.