His penis bobbled and jerked in my mouth as Gary wrestled himself free.I do not know why, but rather than reach down and assist him in getting free fr...om his pants, I got some level of enjoyment allowing him to struggle himself free while keeping the head of his cock in my mouth. I guess even step-siblings just naturally try to torture each other, even when they are engaged in completely inappropriate sexual activity, huh?Once freed from the shackles of his pants, Gary took my hand, and pulled. Com/photos/gallery/8292475/148902204 http://xhamster.com/photos/gallery/10459141/212318253 https://it.xhamster.com/photos/gallery/8813488/161029296 https://it.xhamster.com/photos/gallery/9616326/183447180 https://it.xhamster.com/photos/gallery/8813480/161029129 https://it.xhamster.com/photos/gallery/9616316/183446640 http://xhamster.com/photos/gallery/10634723/219335804 https://it.xhamster.com/photos/gallery/10827993/227855571 http://xhamster.com/photos/gallery/7679917/135716455. I laughed. Frank said it was ok, and we snuggleda bit.He kissed me, actually for the first real time, and I kissed him back.His hands were on my breasts again. I moved his right hand down to mycrotch. My cock was stirring. He grabbed and squeezed it to a harderection. I felt down there. He had an erection also. He broke the kiss,and whispered in my ear that he wanted to lube my ass crack so that hecould come on my ass again. I handed him the lube, and rolled onto myside. He liberally coated. The girls got the house in his will and their mothers moved in as their guardians, of course.He was doing some kind of a research study and picked two sets of sisters for his experiment. They lived together for several months to see if their menstrual cycles became synchronized. Then he had sex with them only on their fertile days. The old coot got three of the women pregnant at the same time but one had a miscarriage. Gale and Stacey were the results of his experiment.The following week the.