Mabel was on her bed writing in the diary that she made when she was 12 . Although everyone told her she was too old for diaries but she still wrote in it . It held all of her secrets , even the ones she couldn't tell Dipper . Most of the diary was full of her fun adventures with Dipper and all of her boy crushes , but the other half were the deepest darkest secrets . Almost finished writing in it then Dipper came in causing Mabel to slam it shut .

"Hey Mabel"

Mabel replies nervously trying to hid her book "Hey Dip , you're home early"

"Yeah i ripped my shirt and lost a shoe so i thought i'd come home"

Mabel looks at his ripped shirt. The cut was across the front of his chest. You could see what ever go him didn't just get his shirt , he was bleeding a little .

"Bro are you okay? You're bleeding a little"

Dipper fell at the sight of his blood . Mabel felt responsible for him passing out so she dragged him to his bed and took off his shirt . Trying not to wake him she cleaned him up and put a new shirt on him . After she was done cleaning him up she ran to her diary , trying to finish what she was writing before Dipper came in .

Dear Diary ,

It's your girl Mabel . Today i made cupcakes with little plastic dinosaurs , i made a new sweater , and i learned that i can lay upside down for 23 minuets! I know , pretty impressive right ! I had that dream again ... the one i keep telling you about . I don't know how i feel about it yet , i mean like DIPPER of all people . I think i like him ... but that would be gross right ? INCEST hahahahaha... So Dipper just came in the room and past out because of me . He's really cute when he is asleep . Now i think i do like him . What if he doesn't feel the same? What would our parents think? What would Stan think!? These are the questions people! Anyway i should go , Dipper is waking up . BYE

~ Mabel ~

Dipper woke up and Mabel was no where to be found . He looked around the room to make sure he was alone . He let out a sigh .

"Why did you freak out like that"

He thought to himself .

"AAGGHHH! I'm such a dork! I always mess up! I wonder if she beli... did she change me? "

Dipper walked to Mabel's bed and picked up the perfectly placed book that read "Mabel' Diary". He knew nobody was aloud to look in it but insisted he'd still look through it since they were twins and did everything together . Flipping through the first pages were just about their adventures in Gravity Falls but the more recently written pages were a little more personal . They were about him . Dipper carefully read them to himself soon realizing that Mabel liked him .

"She thinks it cute when i act tough huh? Maybe i should do that more often ... wait she's my sister. That's like incest! That's disgusting"

He gently placed the book back in it's perfect position and walked out of the room .