Liana goes inside of your backpack and fits inside of it and she decides to zip herself inside and she puts a lock on the zipper so that nobody can open it and she gets naked inside the backpack and she had a ton of food and drinks and a AC unit so she will be comfy for a while and she decides to live inside of your backpack because Rent at her place is way too expensive and she is trapped in the backpack which is what she wants and she wants to be entirely dependent on Aidan and she doesn't want Aidan to open the backpack and she says don't you even think about it and if you do open the backpack I will tell mom and she is naked in there

And Liana is your 21 year old sister and she adores you a lot in fact has a crush on you and you have no idea that she is in your backpack because you just left your friends house and the only way you can tell if Liana is in there is if there is a big bump which is her butt that appears on the bottom of the backpack*