grandpas fantasy come true SeXStoRY

im 19 years old im half black and latina. i have a nice phat booty and nice perky tits. Any guy would be lucky to have me. so i went over to my boyfriends house for the weekend to meet his parents. it was his dad ,mom, and his grandpa living in the house. it turned out they were really nice people. his grandpa was really old like 80 years old and he had trouble walking , he was overweight and had thick glasses.one day everybody left to work and i was to stay at home and look after his grandpa. his grandpa was very friendly and we talked for a while . i was wearing skin tight booty shorts and a tight white t-shirt that you could see my nipples. i noticed his grandpa started acting weird and he started getting a boner, i could see the bulge through his pants. i didnt say anything but it kinda turned me on. to think that this old ugly fat man was fantasizing about me, so i stood up and pretended to pick something up from floor right in front of him. my sexy onion booty was right in front of his face and i even giggled it a little bit just to see what his reaction was. to my suprise he squeezed my right cheek. when he grabbed my ass i jumped up startled and he quikly started apologizing. but i said dont worry about it i dont blame you. so i sat down again this time right next to him, and i started rubbing his leg. i put my right leg over his leg and i could feel his dick rubbing against my thigh. i told him "relax grandpa, ill take care of you".i got closer to his face and started passionately kissing him, as our tongues collided i started rubbing his dick through his pants, and he grabbed a big handful of my ass. he started getting hard so i unzipped his pants and out popped out his dick. his dick wasnt big it was about 5 inches hard, but i didnt care my mission was to make this fat ugly old man's dream come true.as i got on my stomach and arched my back so my ass was in the air, i grabbed his dick and went to work as soon as i put it in my mouth he yelped," omg thank you god, sexy ass sydney, with your fat ass." ,"your a dirty little girl arent you." he said this while he was fondling my ass and as i was sucking his cock. i looked up at him with a mouth full of dick and said, "oh yea daddy , your dick feels so good in my pretty little warm mouth. " i immediately took my shorts off and my shirt . i sucked his dick so good he came in three minutes all in my mouth . after he came i continued to softly tug on his cock and make out with him as he groped me and explored every region of my body. he eventually found my sexy little hairless pussy and he started rubbing my clit , and i moaned, "big dick daddy ohh." he then started eating my pussy so good that i was dripping wet. his dick wasnt hard yet but it was limp so i started softly and slowly jerking his cock as i sucked the tip. he got hard after a minute and i told him to lay down , since he is a feeble old man. i straddled him and got in the reverse cowgirl position. with my phat juicy ass pressing against his cock as i jerked it . then i slowly inserted his dick and started grinding back and forth. he moaned, "ur ass is so sexy , omg, im in heaven." as i bounced on his dick my ass cheeks were jiggling so sexy , so he squeezed my ass with both hands as i slammed down on his dick. his dick was small but it was rock hard and i was wet just thinking about my sexy 19 year old body grinding his 80 year old cock. when he was about to come i stuck his dick deep into me so he could come inside of me. it felt so good, we both came together. after we were done i told him to keep it our little secret. and he did, a month later he was very ill so he moved with me and my fiance, i volunteered to be his fulltime nurse, so we would have all day to play. while my fiance is at work i suck and fuck his old man dick and he gets to live out any fantasy he wants with me,