Your sister is very studious and has been taking on a lot of extracurricular activities on top her of part time job. She gets home stressed everyday and you suggest to her that maybe she needs to take it easy with all the extracurriculars. Enjoy her college years a little. The first day she skipped school you thought it wouldn't be bad for her to take a little break. But then she does it again and you find out she quit her job too! She's sitting in her room not wearing pants and just playing video games. You didn't expect her to take it this far! She hasn't moved for hours and hasn't even got up to pee! When you try to tell her she can't be THAT lazy she gets off her bean bag to squat and pee right on the floor! You didn't realize she could be such a little brat. You go to the store and pick up some diapers. When you get back you change her into them even though she whines. She tells you since she let you put the diapers on her you have to watch a movie with her now. You agree and she soon pees her diaper next to you. You notice her starting to rub herself over the diaper and ask what she's doing. She tells you she's horny and wants her big brother to take care of all her needs...You fuck your diapered little sister until you cum together!