"Mmm, oh, babe, I love you doing my pussy, mmm, yeah, right there, ooooh, don't stop, mmm, yeah, yeah, oh OH, OOH, OOH, AYYE, AYYE, UH, uh, mmm, oh, o...," she cried out as she suddenly tensed then began shaking and trembling. I loved giving her orgasms because she responded so strongly, so dramatically to them.I raised up and looked over at my sister who was sitting at my desk with a pillow in her lap and a hand underneath it. Her panties were puddled around her ankles."How do you want to, babe,. She had been on her feet for thirteen hours solid and there wasn't a break in sight. First, she had worked a half day at the family-owned art gallery. Her parents had taken off on a thirty-fifth wedding anniversary/Christmas cruise. Mariah had intended to spend the holiday with her sister, but Halley has called this morning, explaining that her new boyfriend had been in a car accident and had broken a leg. Of course Halley would choose to stay with her boyfriend instead of her twin sister.. " She stayed a few seconds and began to look into my eyes and the glare of the sun behind her, made her red locks of hair glow like a beautiful star. I wanted her at that very moment. I wanted to kiss her beautiful breasts and make her sing and moan. I wanted her cunt sitting on my face while I was tongue fucking her wet and hot twat. She turned around at the sound of a large truck passing and I could see her well defined ass. All I could imagine was that ass pointing towards the skies as I was. ” I handed Humphrey the bottle. “I can see you are greatly enamoured with Fraulein Gerda, as no doubt she is with you. Professor Potter will give you the vigour and the stamina to fully demonstrate your feeling for her in an unequivocal manner.”He took the bottle and read the label. “If this does what you say it does then I cannot thank you enough. Before my failure last night I was minded to install Gerda as my mistress. If I were single I would marry the girl, I am that smitten.”I admit to.