.WHAT THE FUCK!"Marilyn fully came to from her semi-conscious rambling in her seat on a Coach bus riding along Interstate 91 to an interesting situati...n. She looked up to see her sister's glowing face smiling goofily down on her. When she reached down in her pelvic region, her other suspicion was confirmed; yes, her semi-hard dick was buried balls deep in her sister's ass."Wakey, wakey, sleepy head!" Sharilynn cooed down on her sister. "And be a bit more quiet. It isn't exactly standard sibling. He wailed in ecstasy as his rectal muscles rippled in sync with the pulsing ribs. His erection felt like a granite bat and his bullet-like nipples felt as though they were going to explode. ‘UHHHHHHHHHHHHHHHHHHHHHHHH!!’ The probe now sunk deeper into his enflamed passage. It twisted and turned, pulsed and purred as it explored the eager sheath. It expanded to 7.50′ x 2.75′. Its warm undulating thickness made John’s mind reel with its ecstatic fullness. The phallic partially withdrew then. I put my glass back on the table and hunched forwards a little to give her more room in my jeans.She knew I was going to come and her hand slid right to the end of my cock with just her fingertips working so that I could tell she was wanting to catch the spunk in her palm. The first spurt came out with a gush on her fingers and into my jeans.She looked into my eyes as she continued to milk all the spunk out of my cock onto her hand. I had never had such a huge problem to not reveal what was. Her eyes caught me, and her shoulders fell in what looked like relief. "Oh, thank God," she said, "another girl." She moved toward me and gave me a hug. "This place needs way more estrogen," she said.Kate's my height, maybe a tiny fraction taller than me. She's got a gorgeous smile and sly green eyes that hide behind her the black horn-rimed frames of her glasses. She's got black hair, cut short to just around her jaw line. Tonight she had on a black, tight fitting t-shirt and black jeans, but.