I watched the last episode of counterpart without my fiancee because I was mad at her.
What happened to make you mad at her?
She had lied about something which really pissed me off and we ended up in a fight.
It's understandable that you are trying to soothe yourself after feeling let down by your partner. However, you should talk with your partner about how her lie hurt you, instead of getting revenge. This will help the relationship grow stronger.
I just want to prove a point.
Doing something mean to your partner because they made you mad is a vicious cycle to get into. It's healthier to cool down and then talk through your problems.