Write a story that seems normal on first sight , except for one small detail that makes it extremely creepy on a more careful reading [ WP ]

I woke up this morning at 5 A.M. to go to work like usual. I did my usual morning ritual and got ready to go to the most boring job ever. At least I could look forward to coming home. Today I would see my girlfriend again and catch her in the act of cheating. 
 
 My blood starts to boil as I remember her sneaking around with the other man behind my back. She was MY girlfriend and I felt betrayed by her lack of consideration for my feelings. Granted whether she knows about our relationship is still debatable but I see her with him every night in her room. 
 
 I take my keys and duct tape. I ca n't be late again or my boss will kill me.
