After combing through my hair with my fingers and reapplying my lipstick, I opened the door and crept down the corridor. I had reached the door to my ...oom now, and after just a second of hesitation I opened it. She was sitting awkwardly on the bed and looked up, blinking her brown eyes at me. I met her gaze and the air shifted, something in the air crackled between us and I no longer felt nervous, just anticipation. Wendy rose smoothly and stood in front of me, then reached out and tugged at. "Well, at least the ones you see in their underwear," she finished.Casually, she went into the closet to get a dress. She returned with a short red dress on a hanger and we kept talking as she stepped into it. "Can you zip me up darling?" she asked as she motioned to her back. The zipper started at the top of her ass so I gladly got my fingers on it, pulling it away from her body to view her arse and taking my time. I put my palm flat on her arse to hold the dress down while I pulled up the. Here I was standing gazing at my naked sister, with a raging hard-on. Almost as if she already knew what was about to happen, she turned back her head and continued to allow the water to fill the tub. As she moved, her huge tits jiggled and swayed. I couldn't stand there waiting any longer, so I walked over to her and stood very close. She didn't move. My throbbing cock was going to burst through the fabric that held it captive. I couldn’t resist it any longer. I grabbed hold of her. He told me he would be up in about fifteen minutes. I left and went back to the room. Maggie was just finishing her shower and had a sexy nightie on. I told her Ralph was hot for her and would be up in a little while.In a few minutes, there was a knock on the door and I opened it and there was Ralph with a couple[of beers in his hand. He handed one to me and came in the room.Maggie was laying on the bed and when he had closed the door, got up and walked over to him, putting her arms around his.