She broke the non-awkward silence they had shared, ‘well, I guess I could go for a walk with you.’ She said, ‘I left my shoes up at the pavilion...’ She glanced back up the dock toward shore, ‘The pavilion?’ Dan asked. ‘Yeah, it’s up the hill from the end of the dock.’ She pointed her gloved hand, and he followed it looking back. He realized what beach they were at from his childhood summers at his Aunt and Uncle’s house. He remembered exploring the old dilapidated dock and crumbling pavilion. I wanted to cum at the same time as my sister.My sister's ass lifted up off the bed as her hips gyrated. She was rubbing furiously and I was stroking furiously. Her thighs began to twitch as she came and I lost it. I came all over her door. My cum was dripping down the door. I slowly closed it, wiped off my cum with the towel, and went back to my room to sleep.The next morning, my sister was on the couch in the living room again. I walked into the room and my sister looked up at me and smiled. She loved the feel of her dog's throbbing cock fucking her so deeply. And she loved knowing that her brother was recording the lewd bestial fucking on film.Scotty barked loudly as he continued to fuck his mistress from behind. He jabbed her several times in rapid-fire succession, his hindlegs quivering under the strain of his fast- paced fucking. Then, he would pause for a second or two and pull his cock almost all the way out of her cunt."Noooo!" Gail wailed each time.Biff would rush around to. .the fleeting drops of my cum slowly running down the thin white calves that were still jerking. we showered together, neither of us meeting the other's eyes, and went out for lunch. we didn't say much to each other that afternoon....i guess mostly because every chance i got, and there were quit a few, i had my hands under her skirt feeling the thick sex lips i'd longed for all of my life......this was as much an awakening of our attraction as it was a vacation....and all it would take.