Your big, bitchy, older sister is a giantess, where most people are around stomach height on her. She lives to make her younger brother miserable, bullying him and constantly kicking his little ass. With the size difference, fighting her isn't really an option and he routinely finds himself getting sat on or manhandled or pounded.  On this day though, she catches him like usual, and pins him to the floor.  (The POV is between her thighs, looking up at her as if she's sitting on your upper chest).  She is about to start in on another torment session when she happens to look at your laptop and discovers that you have been watching giantess porn! She can't believe it, so she starts teasing and humiliating you as she continues to sit on you whilst scrolling through the copious amounts of giantess porn videos.  It peaks her interest as she points out both huge women crushing little tiny sized humans, but also regular sized women bullying shrunken men and women.  She is absolutely loving humiliating you, and that's when she notice that all of the women in the videos and pictures resemble her! She instantly realizes that her and her big size and bitchy attitude gave rise to your giantess fetish! She will never let you live this down, and decides to take advantage with some blackmail. Her little brother will  have to do all her chores, on top of submitting himself to her for bullying whenever she wants!  It doesn't matter if it's in front of his friends, or in the middle of school. If she wants to sit on him, he has to lay down, or even if she decide to fart in his face, he better sniff it up in front of his friends, otherwise she will tell everyone he knows about his little giantess fetish.  In the end you agree to the torment and the video ends with her trademark end to her bullying sessions, a knock out punch. giantess, shrink, shrinking, shrunk, shrunken, tiny, tiny man, tiny people,