He gently deposits me, still in my knickers onto the sofa.He pulls his shirt over his head, and in one move loses his jeans and his underwear.I have a...moment when I don’t know where to look. I am suddenly mortified, and unsure, and I realise that this man, this younger man, has all the control and I have none.He kneels before me, his thumbs hook my knickers and he pushes me back on the sofa and pulls them, ridiculously slowly down my legs.The cold of the aircon hits the dampness between my. . gay, str8 and bi ... my fantasies may have change and evolved but I just love sex with guys and girls. I really love being in a group, at a swingers club or a threesome session with a couple especial when the bloke is bi too. It’s just great. I was chatting to one of my mates Andy the other day, we both opened up about our sexuality and I am happy to class myself as bi as love having sex with blokes too...! My mate Andy is straight but loves having threesomes with his sexy girlfriend Jackie. . master!” And made a whine of frustration. I allowed some slight weight back down and she made a frustrated moaning sound. “Ok just hold it there, and breathe... try to relax your muscles...” she was very tense and that wasn’t helping the situation. She began breathing in with her nose, and out with her mouth. Her eyes were closed and her brow was furrowed in concentration. Suddenly, her eyes went wide in surprise as the head of my cock began slipping into her vice like opening.. Heather chose to use her tongue and warm mouth to give her giant grandfather some kind of fellatio.Heather felt her grandfather's cock become harder and bigger alarmingly fast. She felt her mouth stretch even more. She could feel the corners of her mouth feel the strain of his inhuman girth. Ken saw her granddaughter's beautiful face deformed trying to accommodate his cock. Her beautiful nose appeared flattened.Heather's two tiny hands felt inadequate to hold her grandfather's now steel hard.