If she didn’t want tan-lines, the bikini would have to go.Something about being naked in front of her brother didn’t seem right, objectively, but ...he’d suggested it so casually, and try though she might, Mary couldn’t think of any reason to get worked up about it. It was a lovely sunny day, and there was no reason to kick up a fuss about getting naked in front of her brother.Without a word, Mary reached behind her back and undid her bikini top. She was too relaxed to notice her brother’s eyes. Tully sank down in a single slow movement, bottoming out inside her. “Like that?”“Just like that!” she sighed, wrapping her arms around his neck. She began to move underneath him, and Tully began slowly moving in and out.“You’re nice and juicy,” he whispered into her ear. “You lubed up, didn’t you?”“Mmmmm,” was all Babs replied, but it wasn’t clear to Tully what Babs was saying. Could it have been “Mmmmm - yes” or “Mmmmm - no” or just “Mmmmm - don’t stop!” Or was it just a moan of pleasure?. My hand was applying more pressure, as I slid it across her stomach and back up to her tits.To my surprise, she tried to help by slowly grinding her ass back to meet my forward thrusts. By now my precum was flowing freely so, in no time, my dick and her thighs were slick with it’s wetness. My fingers flicked over her nipples again and I heard her gasp.I got brave and took her tit fully in my hand and then started taking longer strokes…. pumping a little faster and harder. That’s when fate came. " Al smirked."Mommy's needy too," pouted Peg."Peg...I'm fucking her first," announced Al."Sure thing, stud." Peggy purred.Peggy escaped Marcy's fist and slithered down the coffee table until she was kneeling beside Marcy. Peggy and Marcy kissed and tongued each other as they caressed Al's balls and cock through his dark brown slacks. As Peggy wriggled out of her bra, Marcy took care of Al's pants... having them to his ankles quickly. Marcy looked up and came face to face with Al's 10 inches of.