"You have a power over me now David" as she slowly moved her groin against me in the most wonderful way. "Will this all turn out good for me, for us, ...I think you know" spoken in a defenseless, loving voice."Yes, Kirsten I think this will all be fine, or I would not go down this road with you, I will never hurt you." I looked into her eyes, she was so serious and I held my sister close as I kissed her again with passion, she responded. We just stood there and kissed her while I massaged her. This she does in a formation of “mouth fucking” as she slides it in deeper. At times, depending on the length of the man’s cock she completely engulfs him until her lips touches his balls. Withdrawing her mouth slowly, she then proceeds to lick him from the bottom of the balls up and sort of give him a cleaning. Occasionally some men prefer to have the area between the asshole and balls also licked. This she enjoys as it increases the process of semen build up and ejaculation is then very new. If it makes you feel better, I can simply remain in the background until you need me, holding my tongue except in the event of imminent peril.’ ‘Okay, dad that may be best, for now.’ ‘By the way Johnny, you are going to need more agents, Mary and Elizabeth are enough. At the rate you are consuming energy, even if you planned on having sex constantly, you will need at least five more agents, if you continue at your current level of consumption. I suggest you begin looking for converts. When you. ” As I continued to talk dirty to him, I think that he began to realize that it was useless to resist my attack on his ass. It could have been that, or he could have begun to like it. He did have a huge boner himself. Either way, his ass muscles loosened up little by little, and I slowly gained deeper and deeper penetration as I humped. He began gasping every time I pushed forward into him. I started fucking him with long, slow strokes that sent my cock in nice and deep. His rear hole.