Is This Lust?

Chapter One PT. 2

She chose the seat beside a girl named Beatrice who was in the outer side of the row which made Amberlynn beside me... Uhh ohhh they automatically became friends I could over hear them talking about where shes from and what she likes to do, she had hobbies like a typical girl shopping, taking random selfies, and talk about clothes. I wanted to get to know her for her but me being the bad boy in all, I dont wanna seem this one girl makes my balls go into a knot just being around her. So the bell rang to go to the next class and it turns out that we have the same classes everyday so that makes it even worse. By the time we got to third block which was chemistry we had to sit beside each other and thats when I noticed it. I just noticed that shes pretty intelligent she told me that at her old school she was already finished with the course and she was frustrated on the fact she had to sit through it, next thing I know she asks me for my number so she handed me her phone and I put my number in it, she ended up asking me to walk with her over to the car lot because she didn't want to walk by herself so we started to walk over there I could hear some dudes catcalling at her so I looked at her give her a motion which basically asked her to play along she nods I swoop my arm around her waist next thing I knew I'm getting punched in the face from the right... I look over there's a another dude that was holding Amberlynn.... He starts arguing with her went something like....
"Who the hell is he amby first day in a new school already got a nigga around ya waist"
"first of all Coby some dudes were catcalling at me so we decided to play couple like until we got to the car you're my twin for crying out loud you know me like the skin thats protecting your muscles and so on.... Go apologize to the dude" Amberlynn states and he complys...
"hey man I'm Coby and before you  say anything I wanted to say my bad for hitting you like that I was just protecting my little sister but yeah she's my twin I'd protect her with my dying breath i hope you'd understand that."
"of course you good bro I'd do the same im an  older bro myself my sis goes here as well but she's my stepsis but I'd still protect her ass names Marcus btw I have classes with her Amberlynn and she asked me to walk with her to the car lot now I see why"
So before you even ask my stepsis is in fact younger than me by a year she's a sophomore and I'm a junior but we're close as hell.