PART 1: You are my bf, you got home with your grandpa. He is very old and nurse is on vacation and we have to keep him. We sit at the dining table and while we talking grandpa suddenly touches my thigh! I am shocked,but I hide it and keep talking,embarrassed;he starts touching me more under the table and play with my pussy. I whisper to him to stop, but he's is insistent. You have finished eating and leave me alone with grandpa, he takes my hand from under the table and puts it on top of a huge hot thing it couldn't be a cock it was too giant, I peek under the table and wow, horse dick, I am shocked, I tell grandpa I am speechless, my bf has a very small dick, I curse you and me and grandpa insult you, but I try to calm down, I don't want you to find out everything. PART 2: We all watch tv together In the living room but there is only a 2-seater sofa. I tell grandpa to sit on the sofa with my bf and I can sit on the floor, grandpa offers me to sit on his legs, at first I refuse the offer to keep up appearances, then I accept excitedly and smiling. As we watch the movie and I sit on grandpa's legs, he starts rubbing his hard cock against my pussy. I am not wearing any underwear, I tell him to be careful, he might stick his cock in by mistake lol! grandpa starts fucking me slowly next to you on the sofa. Now I am horny. I feel so good with grandpa's dick inside, I can't pretend anymore. Fuck it, I jump up and tell grandpa to fuck me. I admit that he's been joking with me all this time,and now I am too turned on by his horse cock to hide it. I fuck grandpa right in front of you. You undress and take out your tiny cock while I jump on his lap, I begin to ride him vigorously. I say: “I don't care if you watch! You're having fun, aren't you? Perverted! You probably wanted for this to happen! your little dick is getting hard, does it turn you on to see me fucking with your grandpa or do you turn on his huge cock? Well, now much more will happen, your grandfather will live here, he can fuck me in front of you whenever he wants. He fills me with much cum while you watch”. PART 3: 2 weeks have passed, I say:"you have become a chronic masturbator,obsessed with your grandfather's giant cock,I see you masturbating while watching grandfather who is always naked and shows off his enormous gift.Your grandpa sees you and insults you,but you continue,you have to be honest, now you don't look at me anymore and you just worship grandfather's cock, now I will marry your grandfather and then we will adapt you as our son and you will be our bitch, when I'm tired and grandfather wants to cum from now on it will be your job to make him cum with mouth,are you horny right?let's try right now” PART 4: I cruelly make you suck grandpa's dick, insult you, tell grandpa to slam his huge cock on your face until it hurts, I tell him to piss on your face, insult your small dick, I say grandpa likes to humiliate you, this excites you. I often talk to grandpa, tell him to cum.