Killer love

Arya and Aiden have been friends since they were born but as they grew older they drifted apart. One thing they remember about each other is the promise, to always help each other no matter what but when Arya asks Aiden to hide a body... what will happen? Will he help or will he rat her out? He is an agent after all?

( I'm not good at writing things from my head so very sorry x)