That is… until he noticed that Mindy didn’t pull away from and just stroke his penis until he was drained… but she continued sucking and strokin... him during his climax… driving him from despair right into wild and repeated spasms of near perfect pleasure and satisfaction. He moaned with the ecstasy of the moment and the long overdue satisfaction of the sexual pleasure his sister had introduced him to… was happy again… at last.Mindy instinctive knew some of the basic mechanics she must overcome. She strained against my desk to get away but I heard her small moan. I slipped my finger down to touch her pussy lips. I very gently traced them and made her body shudder. Without warning I pulled back and told Sara to stand up. When she turned to face me her nipples were hard and clearly outlined thru her blouse. I wanted to chew on them so bad. My cock was now rock hard. I had to have my dick in her! I asked her if she was getting turned on and she only nodded lightly. Take off your shirt I. One of the tests that Doctor Lei usually gave me was to collect a small sample of DNA from my pre-cum using a tiny vial and her little suction tube that she sucked up directly from my manhood tip like some obscene sex fetish from a porn magazine. I knew she was terribly embarrassed by the process but that her devotion to duty required her to do it herself to make certain she was getting the sample without any contamination attached. It required her to hold my shaft out straight and cradle it in. He brought his face up and bit my lower lip and pushed his tongue in. I opened my mouth and he started sucking my tongue. He played with my tongue for some time. He pushed my uniform up and started licking my navel. He was pressing my hips while doing so. He unzipped his pants and brought his dick out. He brought it near my face and started rubbing it on my lips. He made me open my mouth. I got hold of his dick and pulled down the foreskin. I licked his dick and started sucking it. He got hold.