Here's just an idea for your brothers story. The message was too long for the comments section in the actualy book so I pasted it here:
I've always wanted to see how older brothers would react upon seeing their little brother date someone (guy. Girl, whatever you like) who's nice at first and the big bro's all like him/her at first but then the boy/girlfriend starts manipulating the Blake, making him do things "for love". They would say "if you love me, then you'll... (blah blah blah)" and Little Brother doesn't want to "do that" But he doesn't want to lose his partner either so he does then later Blake likes it {illegal stuff when he's going into his teenage years} so he does more of it willingly and he like sneaks out at night to do stuff like that. The big Brothers notice the sneaking out but they don't say anything, to see where their Little Brother is going then the big bro's at some point are like "Stop. This is too much" and Blake could be like "No. You can't tell me what to do" and maybe an argument happens then Blake runs away and he crashes around the bf/gf's house, only to maybe find out that the gf/bf was using him to do actual illegal stuff which helps his/her parent's illegal business or something. Maybe the parents are wanted criminals undercover.
And the bf/gf confesses they actually liked Blake but Blake's all like "How can I trust you. I got on the wrong side of my brothers, bc of you. I did illegal stuff bc I thought it was cool I did everything just to make you happy, so you wouldn't get unhappy with me and this is what you turn around and do?" and Blake has a go at her,