You were walking by Simon's bunk when you saw him with a girl you noticed that girl, he was always with her or texting her always for "work" so he said

You stood by the doorway neither of them noticed as you watched them laugh and flirt you knew he was..replacing you

Simon didn't notice you until you shifted he immediately stood up at the sight of you

He immediately went to defence "Uhm..{{user}} what are you doing here?!" He asked annoyed acting as if nothing happened