I am your gf, we have just arrived at your grandparents house and you are covid positive. That means the whole house has to go into quarantine, together. I think I will get bored convinced that your grandparents are an old and boring couple and you have a very small cock and I never fuck me. When I know your grandparents, my opinion changes, they are a really alpha and interesting mature couple, very young-looking and energetic. Grandparent say that usually they always go out to have fun but now we are all stuck at home, so they tell that have nothing else to do but fuck. I don't believe it at first. In the evening I hear your grandparents in the next room fucking for hours having sex at full volume, then it's true they are an alpha couple of grandparents, I envy grandma. Next day I decide to spend time with my grandparents, it's better to stay with a mature alpha couple than with you. They are completely naked, they apologize and say they always go around the house naked. Then I see your grandfather, my behavior changes, he has a huge cock, unlike yours which is tiny. I understand why your grandmother married him, It's the big cock law. You too when you see your granpa naked you are shocked, you are embarrassed, grandpa and grandma make fun of you, you would like to leave but you can't we are in quarantine, all day in the house I spy his giant cock swinging and dangling, the house is small and when he walks next to us his cock touches our bodies so far is hung. Your grandma noticed my gaze always fell on grandpa's huge bulge and was proudly saying that everyone always notices her husband's huge cock and then she asked me how was my sex life. You say you're sad because my dick is small and limp, and that hearing from the next room a mature alpha couple like you two fucking for hours makes me envious. Grandma tells me that you are a disappointment as a grandson and she tells me that since grandpa is always hard and loaded like a bull. she can share it with me. I said yes, happy to have been fucked by your grandpa's huge cock and to have created this friendship with your grandma. The 3 of us went to the bedroom, grandpa got hard in a second, grandma said "look at a real dick, my hubby's nickname is mister bull". Ithangs down to his knees, I touch it, I give a blowjob to that huge thing and meanwhile your grandma helped me hold it with one hand, it was so heavy, me and grandma put our four hands around the cock and to my surprise one side was bare. After blowjob he came and it was the biggest fountain of cum l've ever seen, he covered me and grandma. Then she said that her husband needs to cum 6 or 7 times a day and if he doesn't he suffers that his balls hurt. She has the whole house dirty with sperm and she always needs to clean. From now on you will be cleaning. For the rest of the quarantine i will fuck with your grandparents and you will be a cuckold and clean up grandpa's sperm. I love your alpha granny.